Blood Type Diet Debunked

Blood Type Diet Debunked
4.45 (88.97%) 29 votes

A systematic review finds no evidence to support the notion that people should choose diets based on their blood type.

Discuss
Republish

Below is an approximation of this video’s audio content. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video.

It was Adolf Hitler who coined a propaganda technique he called, “the big lie,” arguing that people may be more likely to believe “colossal untruths,” because “they would not believe that others would have the impudence to distort the truth so infamously.” So, “in the big lie there is always a certain force of credibility.”

The book Eat Right for Your Type makes the astounding claim that people with different blood types should eat different foods. Type Os are supposed to be like the hunter, and eat a lot of meat, whereas people with type-A blood are supposed to eat less. In one of the world’s most prestigious nutrition journals, a systematic review of the evidence supporting blood-type diets was published. They didn’t find any.

“Diets based on the ABO blood group system have been promoted over the past decade…[but] the evidence to support the effectiveness of [such] diets [had evidently] not previously been assessed in the scientific literature.” Actually, in the Journal of the Norwegian Medical Association, there were a number of papers that came out of a day-long scientific seminar held by the Norwegian Society for Nutrition. Hard to believe they would even take the time, but evidently 40,000 copies of the book had been sold in Norway, and so, good for them. They sought to determine “Blood type diets: visionary science or nonsense?” And, they concluded: nonsense.

What was so outrageous is that “[t]he blood-type diet is promoted and justified [in the book] by [supposed] scientific arguments,” yet the author takes “no pains to prove” his ideas—just presenting them “simply as facts,” taking advantage of people’s ignorance of biology.

His arguments sound scientific, and he uses lots of big words. But, he displays a fundamental misunderstanding of the science, describing the book’s understanding of some basic tenets of blood-type biology as “absurd.” “There should be no doubt that [had the author]…practiced in Norway [as opposed to Connecticut], he would be in violation of the “so-called Quack [Law].”

The book cites the work of blood-type biochemists, but if you ask the actual experts, as scientists, they say they obviously have to keep an open mind, but not so open your brains fall out: “[I]t must be stated that an ‘open mind’ should not extend to some of the non-scientific literature where there are books on the ABO [blood-type] system of pure fantasy. The most recent and incredulous of these claims [that] individuals of each ABO blood type must subscribe to a [particular] diet.”

I don’t know how researchers have the patience to read these popular press books, but it can “lead to an appreciation of the ridiculous aspects of the many ignorant and preposterous claims.”

“So, what should the overall assessment of [this] work be?” The nicest thing you can say about the book is: he does have a good “imagination.”

Is it any worse than people who believe their fate is “determined by” the stars, though? Well, yes, because astrologists aren’t telling a third of the population to go out and eat organ meats.

The diet is not as bad as some. “[P]ositive results reported by [some] individuals may well be due to a general improvement [in health] in diet and lifestyle (less fat and sugar, more fruits and vegetables, less smoking, [and] more exercise).” Look, anything that gets people to eat fewer doughnuts.

But though this may get lost a bit in translation, a professor of laboratory medicine at the Norwegian University of Science’s analysis concluded that the author’s “learning must be considered junk and without scientific foundation.”

What did the new review find? They sifted through over a thousand papers that might shed some light on the issue, and “[n]one of the studies showed an association between…blood type diets and health-related outcomes.” They conclude that “there is currently no evidence that an adherence to blood type diets will provide health benefits, despite the substantial presence and perseverance of blood type diets within the health industry.”

The author responded to the review on his website, saying that there’s “good science behind the blood type diet, just like there was good science behind Einstein’s mathematical calculations,” and that if blood-type diets were just tested in the right way, just like Einstein’s E=MC2 , he would be vindicated—complaining that “you don’t see any studies on blood types and nutrition [because of] [l]ittle…interest and…available money.” He’s sold over “7 million” books! Why doesn’t he fund his own studies? That’s what the Atkins Corporation did.

And, the answer is: he has! In 1996, he wrote, “I am beginning the eighth year of a ten-year trial on reproductive cancers, using the Blood Type Diets. By the time I release the results in another 2 years, I expect to make it scientifically demonstrable that the Blood Type Diet plays a role in cancer remission.” Okay, so that would be 1998, and the results? Still not released, 16 years later.

Clever tactic, though, saying you’re just about to publish, banking that nobody would actually follow up. So, in his sequel, he said he was “currently conducting a twelve-week randomized, double-blind, controlled trial implementing the Blood Type Diet, to determine its effects on the outcomes of patients with rheumatoid arthritis.” That was ten years ago.

As my Norwegian colleagues bemoaned, “it is difficult not to perceive the whole thing as a crass fraud.”

Please consider volunteering to help out on the site.

Images thanks to giftedstudieswku, Gastev, and Menage a Moi via flickr

Below is an approximation of this video’s audio content. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video.

It was Adolf Hitler who coined a propaganda technique he called, “the big lie,” arguing that people may be more likely to believe “colossal untruths,” because “they would not believe that others would have the impudence to distort the truth so infamously.” So, “in the big lie there is always a certain force of credibility.”

The book Eat Right for Your Type makes the astounding claim that people with different blood types should eat different foods. Type Os are supposed to be like the hunter, and eat a lot of meat, whereas people with type-A blood are supposed to eat less. In one of the world’s most prestigious nutrition journals, a systematic review of the evidence supporting blood-type diets was published. They didn’t find any.

“Diets based on the ABO blood group system have been promoted over the past decade…[but] the evidence to support the effectiveness of [such] diets [had evidently] not previously been assessed in the scientific literature.” Actually, in the Journal of the Norwegian Medical Association, there were a number of papers that came out of a day-long scientific seminar held by the Norwegian Society for Nutrition. Hard to believe they would even take the time, but evidently 40,000 copies of the book had been sold in Norway, and so, good for them. They sought to determine “Blood type diets: visionary science or nonsense?” And, they concluded: nonsense.

What was so outrageous is that “[t]he blood-type diet is promoted and justified [in the book] by [supposed] scientific arguments,” yet the author takes “no pains to prove” his ideas—just presenting them “simply as facts,” taking advantage of people’s ignorance of biology.

His arguments sound scientific, and he uses lots of big words. But, he displays a fundamental misunderstanding of the science, describing the book’s understanding of some basic tenets of blood-type biology as “absurd.” “There should be no doubt that [had the author]…practiced in Norway [as opposed to Connecticut], he would be in violation of the “so-called Quack [Law].”

The book cites the work of blood-type biochemists, but if you ask the actual experts, as scientists, they say they obviously have to keep an open mind, but not so open your brains fall out: “[I]t must be stated that an ‘open mind’ should not extend to some of the non-scientific literature where there are books on the ABO [blood-type] system of pure fantasy. The most recent and incredulous of these claims [that] individuals of each ABO blood type must subscribe to a [particular] diet.”

I don’t know how researchers have the patience to read these popular press books, but it can “lead to an appreciation of the ridiculous aspects of the many ignorant and preposterous claims.”

“So, what should the overall assessment of [this] work be?” The nicest thing you can say about the book is: he does have a good “imagination.”

Is it any worse than people who believe their fate is “determined by” the stars, though? Well, yes, because astrologists aren’t telling a third of the population to go out and eat organ meats.

The diet is not as bad as some. “[P]ositive results reported by [some] individuals may well be due to a general improvement [in health] in diet and lifestyle (less fat and sugar, more fruits and vegetables, less smoking, [and] more exercise).” Look, anything that gets people to eat fewer doughnuts.

But though this may get lost a bit in translation, a professor of laboratory medicine at the Norwegian University of Science’s analysis concluded that the author’s “learning must be considered junk and without scientific foundation.”

What did the new review find? They sifted through over a thousand papers that might shed some light on the issue, and “[n]one of the studies showed an association between…blood type diets and health-related outcomes.” They conclude that “there is currently no evidence that an adherence to blood type diets will provide health benefits, despite the substantial presence and perseverance of blood type diets within the health industry.”

The author responded to the review on his website, saying that there’s “good science behind the blood type diet, just like there was good science behind Einstein’s mathematical calculations,” and that if blood-type diets were just tested in the right way, just like Einstein’s E=MC2 , he would be vindicated—complaining that “you don’t see any studies on blood types and nutrition [because of] [l]ittle…interest and…available money.” He’s sold over “7 million” books! Why doesn’t he fund his own studies? That’s what the Atkins Corporation did.

And, the answer is: he has! In 1996, he wrote, “I am beginning the eighth year of a ten-year trial on reproductive cancers, using the Blood Type Diets. By the time I release the results in another 2 years, I expect to make it scientifically demonstrable that the Blood Type Diet plays a role in cancer remission.” Okay, so that would be 1998, and the results? Still not released, 16 years later.

Clever tactic, though, saying you’re just about to publish, banking that nobody would actually follow up. So, in his sequel, he said he was “currently conducting a twelve-week randomized, double-blind, controlled trial implementing the Blood Type Diet, to determine its effects on the outcomes of patients with rheumatoid arthritis.” That was ten years ago.

As my Norwegian colleagues bemoaned, “it is difficult not to perceive the whole thing as a crass fraud.”

Please consider volunteering to help out on the site.

Images thanks to giftedstudieswku, Gastev, and Menage a Moi via flickr

Doctor's Note

So rarely are popular press diet books afforded such fact-checking. Kudos to these researchers. If only we had this 13 years ago, when the book was on the bestseller list!

I have a few videos on popular diets, such as:

I also wrote a book about low-carb diets, which is now available free online, full-text, at AtkinsFacts.org.

Unfortunately, nutrition illiteracy is not just a problem among the public, but also among the medical profession:

If you haven’t yet, you can subscribe to my videos for free by clicking here.

155 responses to “Blood Type Diet Debunked

Comment Etiquette

On NutritionFacts.org, you'll find a vibrant community of nutrition enthusiasts, health professionals, and many knowledgeable users seeking to discover the healthiest diet to eat for themselves and their families. As always, our goal is to foster conversations that are insightful, engaging, and most of all, helpful – from the nutrition beginners to the experts in our community.

To do this we need your help, so here are some basic guidelines to get you started.

The Short List

To help maintain and foster a welcoming atmosphere in our comments, please refrain from rude comments, name-calling, and responding to posts that break the rules (see our full Community Guidelines for more details). We will remove any posts in violation of our rules when we see it, which will, unfortunately, include any nicer comments that may have been made in response.

Be respectful and help out our staff and volunteer health supporters by actively not replying to comments that are breaking the rules. Instead, please flag or report them by submitting a ticket to our help desk. NutritionFacts.org is made up of an incredible staff and many dedicated volunteers that work hard to ensure that the comments section runs smoothly and we spend a great deal of time reading comments from our community members.

Have a correction or suggestion for video or blog? Please contact us to let us know. Submitting a correction this way will result in a quicker fix than commenting on a thread with a suggestion or correction.

View the Full Community Guidelines

  1. There are too many claims out there stating to be pure scientific fact, but in all actuality they’re nothing more than pseudoscience. I’m delighted to see a video like this, and I believe more people need to remain incredulous of claims that don’t cite any peer-reviewed science. Keep up the good work, Michael.

    1. I agree. I wish someone would review Hyman’s Blood-Sugar Solution 10-Day Detox. In many ways, the approach seems sound (functional medicine, lots of whole-foods fiber, and even vegan-options for meals); I am wondering specifically about the use of the various supplements–esp. PGX–and the quantity of soy per day for well beyond the 10 days (90 days is recommended as a next step, I’m pretty sure.).

    2. And mind you, even peer reviewed science is contradictory depending on the scope of the analyses.
      Peer reviewed science is all over the board with conflicting conclusions in regards to diet.

    3. Even with peer reviewed science, conclusions on much of dietary matters are contradictory, due to different scopes of analyses. Your body reveals. Be mindful of what your body indicates with the dynamics of living throughout your life and the environment you live in,… and the lifestyle you have.

  2. The battle against misinformation seems to be daunting, maybe even as large as the battle against the standard american diet. I participate in Quora and my goodness are there’s some adamant and active Paleo people there. It stresses me out to do battle with them.

    1. At my age, and having been passionate about reading ‘everything I could get my hands on’ for going on 50 years, I know exactly what helps MY body, function top notch.
      This gem has shown me time and time again;
      ‘We are all unique therefore what’s very best for us, is ‘our own BODYS reaction’ and response to all things.’
      Keep an open mind. Read an immense variety of ‘theories’ being not in a hurry to dismiss unusual suggestions, without researching them.

  3. I’ve always believed that we’re much more similar than we are different. We produce the same digestive enzymes, need the same nutrients and replace the same cells as they wear out. Scientists have found that our needs for each nutrient falls along a narrow bell-shaped curve. According to the blood-type diet, I should be eating lots of meat- and I used to. The result was that I was 20 pounds overweight; my joints ached; I slept poorly; was often depressed and had a poor memory. Then about 12 years ago, after seeing a book in the library by John McDougall, I went on a plant-based diet. The weight fell off me effortlessly, I now get a good 7 or 8 hours of solid uninterrupted sleep; I find myself feeling cheerful for no particular reason and my memory is just as good as it was 40 years ago. As far as I’m concerned, we’re all need to be on a type-P diet; P for plants.

    1. I like Dr McDougall as well, my stumbling block to becoming vegetarian is my family even though I don’t live with them anymore they tend to talk down vegetarian life style.. like it’s some sort of bad thing.

        1. Maybe try transitioning instead of going full force into a plantbased lifestyle. It doesn’t have to be all or nothing, just start focusing on eating more whole plant foods and they will push out the animal foods. Also, make sure you’re getting a vitamin B12 supplement since B12 is difficult to get on a plantbased diet. It took me a long time to transition and I didn’t always have the support of my family but now they are all starting to go plantbased because they see how I have lost weight without any calorie counting and I still have energy and vitality.

      1. Katty, it’s your life, so it’s your decision. Of course you can influence your family to have better and healthier habits, but that is their choice. Now, if you have children, ie people who depend entirely on you, it is your duty to guide and influence right. I suggest you study and research a lot until you are sure how to move on, but always remember, it’s your call.

    2. I was on a plant based diet for years and felt absolutely terrible. My best friend was on a plant based diet where 70% of his calories were carbohydrates – he gained 45 pounds. So your statement that we all need to be on a plant based diet is a ridiculous recommendation.

    3. Ruddy, I’ve been tempted to do this for several months now. I’ve known for decades, that small children, and the elderly, should have small portions of Protein, in the form of meat, and not every day.
      This is how I was taught and brought up, but also back in the day, meat wasn’t as plentiful, as these days, mostly because of the Takeaways everywhere now, contributing to such Health problems.
      I worked for years, after training for Caring for the Elderly and Disabled, and the theory of the digestion, at that end of life, after retirement, being a wee bit slower and ‘tired’ so no need for so much Protein, made sense, and main meal at the middle of the day, and light meal in the evening.

    4. It appears that Rudy made a healthy dietary change by choosing to follow the McDougall program. It would appear from the wording in the message, he changed from the all American diet high in meat, sugar, processed foods, over cooked foods, and lacking in whole, raw foods. Certainly such a change would result in health improvements. Certainly a step in the right direction to improve health. There could be additional steps to be taken in the right direction, which could reap additional benefits. Each individual must find the right balance and that balance cannot be found if the mind is closed, not open to further learning. For example, why would Rudy conclude that meat was the problem, rather than the excess sugar, processed foods, lack of whole foods in the diet, etc. Still some learning to do, which takes an open mind. The journey is not over yet, all the evidence in not in, the BTD could contain an important piece of the puzzle. But it to should not be the end of the journey.

    5. Were you eating green grass fed animals and chickens that eat bugs? I already know the answer, it’s no. Do the research on what they feed animals on today’s “farms” and you will find your weight gain and lack of energy culprit.

  4. The Paleo Diet™ (yes, it is trademarked) and Blood type diets are funny. People actually believed that? Over 7 million books sold, maybe at $25 each, that is about:

    $175,000,000

    Maybe they have a “1 year membership, save over *add % here*”, about $50 per year. Maybe 7m people buy that too and that maybe equals to:

    $350,000,000 + 175m =
    over $500,000,000 …maybe

    Wow.

    Profits, just profits. $$$$$$$$$$ money money money.

    “His arguments sound scientific and he uses lots of big words”
    Totally agree, I see this on TV too.

    1. Sorry Broccolli.. But. Many times, in many ways, that Eat Right for Your Type, is right for me.
      See. Different strokes, for different folks…..

      1. I was skeptical about the blood type diet 20 years ago when it was first proposed to me for my son. Two months prior, my 2 year old son had started having seizures, increasing in severity and occurrence. We had taken him to a doctor who was a regional specialist for epilepsy, and he was prescribed meds. This doctor had told us that our son would be on seizure meds for the rest of his life, and prepare ourselves for him to be wheelchair bound as well. We asked about the ketogenic diet, as one of our son’s in-home therapists had told us of it being a god-send for her 4 year old daughter, who had exhausted all available seizure medicines, without sustained success, before the doctors had tried the keto diet as a last effort. Our doctor was unwilling to try the keto diet, until all other medical treatments were exhausted. We, on the other hand, wanted to try diet (it’s just food), and sought a “natural” doctor, who recommended the blood type diet.
        Being skeptical, and armed with only a biology degree, I needed something more to go on. This doctor gave me the eat right for your type book, and based on it’s theory that blood types seem to correlate to specific food sensitivities, we gave it a try. Our family was all type “A”, so everyone in our home went on the diet (at first). Not only did his seizures stop within 2 weeks, he was clinically discharged 3 months later, as he had a clean EEG. The doctor was really upset that we didn’t follow his advice. Our son has been seizure free, and seizure med free for 20 years, excepting a hospital visit, having to go to the ER when we woke up to him having back-to-back seizures every 3 minutes. We found the evidence of him helping himself to orange juice in the middle of the night, and he was back to normal after 4 days and released from the hospital. Today, he can eat anything, although we avoid making the “avoid” foods a large part of our diet. And he is far from being in a wheelchair.
        As far as the effect on me, I had chronic acid reflux before we went on the diet, monthly bouts of sour stomach and diarrhea. They disappeared completely, and today only occur when I eat more than a little of the “avoid” foods. I know people with other blood types that did not notice any benefit from the BTD, but our experiences have been significant enough to believe there may be something to the food sensitivity – Blood antigen type diet.

    2. Well, I would never accuse D’Adamo of being the brightest bulb in the box. I have a ton of questions I’d like answered about his ideas. And yes, his imagined “history of how blood types evolved” is eyebrow-raising for me. But I do give him credit for taking step 2 in the understanding of blood type’s relationship to diet and health. His father took step 1 when he noticed that the same diet that worked healing wonders in some patients, made other patients worse… and that the vegan diet worked well for patients with type A blood, but not type O blood. That observation seems like one that deserved to be studied further – and D’Adamo Jr did that… but not entirely to my satisfaction and obviously not to the satisfaction of others. I’d like to see this taken further. But then, people who actually help patients heal are often off’d, you know… have been for years… 84+ doctors have been ‘accidented’ or ‘suicided’ or even blatantly murdered this past year. People are becoming wiser about health, thanks to people like Dr. Gregor – and D’Adamo, so the medical and pharmaceutical industries, hospitals, etc, are all losing money. Can’t have that!

      But neither Dr. Gregor nor the AMA nor NIH nor Norwegian Medical Association has actually done an iota of actual research into the subject. They all base their pronouncements on opinion, not fact. “There is no evidence” is not evidence. Fact is that no medical school in the US requires more than a smattering of a class in nutrition – and few doctors know much about the subject. I suspect that, as part of the worldwide push to make medicine the only game on the planet, Norwegian medical doctors are also under the thumb of the pharmaceutical industry.

      “Nutrition opinion” does not equate to “nutrition fact”. Even an entire medical organization’s opinion does not equate to fact. And medical doctors may not be the best source of information on the blood type diet, as the blood type diet could be a significant competitor to the pharmaceutical industry. What if people actually began to “Let food be thy medicine” and got well without pharmaceutical drugs? It’s been happening and will continue to happen.

      I respect that Dr. Gregor usually uses sound studies in his presentations, but this one has no studies that contradict the blood type diet premise, just authoritative pronouncements. I think the blood type theory deserves more attention from real researchers. And yes, I wish D’Adamo himself would spend the money he’s made from books on more research, but who knows that he and his family have not been threatened by whoever or whatever it is that has been killing MDs this past year. Perhaps Dr. Gregor faces the same challenge. Hopefully the hash’assassin tribe will be behind bars soon. In the meanwhile, it IS best for all wise people interested in healing, to stay low. A time will come soon when the truth about health will be told more boldly. Fact is, it truly is your chronic thought patterns that etch themselves into your face, organs, posture, etc… but this is not the time or place for that discussion. Back to…

      The AMA has quite a stranglehold on doctors in the USA. The NMA may have the same stranglehold on Norwegian MDs, since the international pharmaceutical industry wants no competition to its market. I have spoken to numerous people who have asked their doctors for blood type information and the patients have been patted on the head like children and told they have no need to know their blood type. Why would a doctor refuse to give patients their blood type unless they felt a little threatened by the blood type theory? “I own your body,” says the medical society, “and I don’t want you treating yourself – with food! – That is disrespectful to our JAMA advertisers!” The same accusation leveled at D’Adamo is undoubtedly leveled at McGregor because the consumption of animal products is a huge profit producer for medical offices and hospitals.

      I believe that Dr. Gregor is motivated to help people be healthy. And might it be possible that some issues – such as health and diet – are more complex and deserve in-depth research rather than a slick, superficial video. Most of his videos are very helpful. This video is a disservice to its audience.

      Other than competing with the pharmaceutical and medical industries, what is the perceived bottom-line “problem” with the blood type diet? Is it because type O is supposedly ok with meat? The amount of meat recommended for type O is actually minimal compared to the amount my father (who died of heart disease) used to eat. Vegetables and grains are a huge part of the type O diet. I have a friend who is a type O vegetarian and benefits from the BTD info. I am a type A vegetarian and felt confirmed by the book – no need for meat, fish, eggs or dairy.

      Why make a video based on opinion and not do an in-depth study? If it were profitable to the meat and dairy industry or the medical and pharmaceutical industries, you can bet the research would have been done a long time ago.

  5. Dr Greger @nutrition_facts: Any wise nutritionist knows maintaining blood sugar in a favorable therapeutic Zone is primary. All of you vegan vegetarian pushers like http://twitter.com/@DrNealBarnard eat way too many high glycemic carbs to keep blood sugar stable. I think the reason you guys don’t get diabetes is cause you haven’t had a trauma or chronic stress or some physical condition that uses up all your stores of ascorbate. The purpose of the Blood Type diet is to use it as a method to identify foods that are personally intolerable, foods that cause of autoimmune dysregulation, foods that cause unstable blood sugar. Be careful how you speak about our nutrition minded colleagues like Dr D’Adamo. http://twitter.com/@rivkafreeman warns you: Never ever speak about http://twitter.com/DrBarrySears in the same sentence as Atkins ever again because Zone Science rules; the Zone Diet can be done Vegan Vegetarian and it’s the key to healing, living and winning!

    1. I love being an American. We are free to believe the darnedest things. Too bad that some of these beliefs may hasten an early death.

    2. Blood sugar is held stable in healthy people by the pancreas producing insulin. The reason we vegans don’t get diabetes (T2) is we don’t accumulate excess intramyocellular lipids, thanks to our diets.

    3. I’m confused rivka…are you implying that ascorbate deficiency results in diabetes? Ascorbate is essentially a Vit C salt – very easy to remedy a deficiency if you eat a plant based diet or take a vit c supplement. But, just for argument’s sake, if vegan/vegetarians Don’t get diabetes, and if ascorbate deficiency is the cause of diabetes (which it isn’t), why not choose to just supplement ascorbate vs follow some whole diet that has been scientifically proven to cause pretty much all the major diseases of today?

      1. Hey Molecular Bio thanks for asking. Diabetes expresses or manifests (people get diagnosed) when they experience trauma, stress or they chronically eat too much high glycemic carbs that cause reactive hypoglycemia and rebound cortisol production. I equate adrenal stress and cortisol production with not enough ascorbate. Check out the ascorbate flush protocol cause adequate ascorbate keeps the adrenals from freaking out and burning out. I think Dr Greger and Dr Barnard eat enough plant based foods and have ascorbate stores. Hope they don’t experience traumas, like death of a child or getting cancer, or chronic stress like not having a job or money or enough donations. I don’t think it’s possible for me to just eat Vegan and be ok. I am not giving up medical nutrition therapy cause they dump extra Chemtrails here in the Jewish part of Brooklyn. I could identify who needs ascorbate based on blood test results and I would recommend adequate ascorbate, and to minimize insulin resistance I hold by Dr Sears and recommend adequate omega 3 for someone with a family history of diabetes along with unlimited low carb vegetables and measured amounts of high glycemic carbs.

        1. Wow, chemtrails. You accept health nonsense about diet because you accept health nonsense connected with political conspiracy, the sort that strongly suggests scientific ignorance or deep willingness to shove it out of the way when it intrudes on the fear-and-oppression ordered part of your worldview. You accept the BT diet and go to extra lengths to try to justify it in the face of contradictory evidence because you are quite light on science to begin with. You pick what is sensational and what may otherwise make you feel more comfortable with yourself perhaps a bit too often; I’d say that instead you should be trying harder to have a view of science that doesn’t require special pleading to get around a rather mundane physical explanation.

          1. If you got breast cancer at age 25 from taking Pathmark synthetic Vitamin E 15,000IU you would have a fear-and oppression world view too ghostu.
            I don’t see why we need to find beneficial outcomes in a population when this way of categorizing foods is for individualized use. The BT diet may be valuable for someone with MS or allergies that are impossible. What is wrong with thinking there is something to be gained from every one and every thing?

            I am little light on science, I don’t make up anything by myself; that’s.why I contribute $500 a month to NutritionFacts.org. I’m planning on asking some baseball players for a few mil soon so I can give at least $5,000 a month.
            Actually I love attention from you. I read this comment every day since you wrote it. You make me lol, Ha Ha Ha. It feels great to laugh. There’s a song I want to play for you but I don’t know how. It’s called “SHE DRIVES ME CRAZY” by Fine Young Cannibals. Ha ha ha!

        2. I agree with ghostu. I don’t think it makes much sense trying to rationally discuss nutrition with someone who believes in such utter BS as chemtrails. No offense, just experience.

          There seems to be a large audience for both nutritional information and all sorts of health-related conspiracy theories and FUD which is very profitably fostered by popular quack sites likes Natural News or Mercola. I think it’s the information overload many people can’t handle and fall prey to paranoia.

          1. Here is a link to my teacher Dr Russell Blaylock MD from Mobile, Alabama. We had him in Clinical Nutrition Certification Class at http://www.iaacn.org about isolated soy protein is an excitotoxin! This link is a Dr Blaylock interview with visuals explaining every health risk from #Chemtrails and what they do to your brain. http://www.youtube.com/embed/X3IW-TGGIk0
            If this link doesn’t work, I’m sending it to http://twitter.com/@rivkafreeman too.

          2. Wow I missed your dis to the Health Ranger and Mercola. Why do you think they are quacks? Oh right I’m the wise person who can learn from everyone and everything. What is FUD please? I really hate that you think chemtrails is nothing; breathing and topical exposure to aluminum dust is absolutely a health risk.

          3. You just walk in the door with a preconclusion that chemtrails are “utter BS”. Why, because you have “experience”? Experience in what? Perhaps you’ve jumped into your private jet when you saw a chemtrail, flew up there and observed that, Hey, they’re only contrails, there are no chemtrails, it’s just water vapor! Is that how you “know” with such conviction that in fact there is no aluminum, barium, etc fallout? No? How else do you know? Maybe you “know” because you believe that all “conspiracy theories” are only speculation and you’ve never actually tipped your head up to look? Newsflash: Many former speculations that were derogatorily called You just walk in the door with a preconclusion that chemtrails are “utter BS”. Why, because you have “experience”? Experience in what? Perhaps you’ve jumped into your private jet when you saw a chemtrail, flew up there and observed that, Hey, they’re only contrails! There are no chemtrails, it’s just water vapor. Is that how you “know” with such conviction that in fact there is no aluminum, barium, etc fallout? No? How else do you know? Maybe you “know” because you believe that all “conspiracy theories” are only speculation? In any case, many contradict you and they’re very diverse and bright. Links at your request.
            I’ve read Mercola’s site for 15 years, NN almost as long. There is absolutely no sense whatsoever to your quack comment. There are thousands of pages of information on both sites, MASSIVELY REFERENCED with links. On these videos , the references fly by and you’d have to keep your finger on the pause button to even have a chance to get the reference if you’d like to verify it yourself. At Mercola, there are hundreds of interviews with all manner of doctors and working scientists. There is a robust forum where I’ve learned even more.

            But then you state that people could fall prey to paranoia because of information overload. These are two separate issues, quackery and overload. With these two adjectives you’ve evoked four categories: quack sites with too much info; credible sites with too much info; quack sites with succinct info; and credible sites with succinct info.

            I’ve read Mercola’s site for 15 years, NN almost as long. There is absolutely no sense whatsoever to your quack comment. There are thousands of pages of information on both sites, MASSIVELY REFERENCED with links. On these videos, the references fly by and you’d have to keep your finger on the pause button or play it over and over to even have a chance of getting the reference if you’d like to verify it yourself. At Mercola, there are hundreds of interviews with all manner of doctors and working scientists. There is also a robust forum where I’ve learned even more from dedicated health enthusiasts.

            But then you state that people could fall prey to paranoia because of information overload. These are two separate issues, quackery and overload. With these 2 adjectives you’ve evoked 4 categories: 1) quack sites with too much info; 2) credible sites with too much info; 3) quack sites with limited or succinct info; and 4) credible sites with limted or succinct info. The apparent false implication is that only categories 1 and 4 have any members.

          1. That’s cause Dr Sears likes a whole egg with many egg whites omeletes every morning. Maybe I should forward him some of Dr Greger’s videos about eggs. He may not look good but he is brilliant and practical. Dr Sears worked for Upjohn and told them to give it up cause no one will want injections to lose weight. His therapeutic Zone Diet deserves as much respect as we all give Dr Greger and NutritionFacts.org

      2. You know what Molecular Bio: Ascorbate deficiency might not always cause diabetes, but ascorbate deficiency makes my ear nose and throat mucus membranes itch and taking an adequate amount helps me stop asthma. Ever hear of ascorbate flush protocol by Dr Russell Jaffe? That’s how you figure out how much ascorbate is appropriate for your needs.

    4. Diabetes appears to be a natural consequence of lipid accumulation impairing muscular/adipose cell insulin sensitivity, followed by glucolipotoxicity to pancreatic beta cells. I discussed relevant reviews and diet trials here.

      You won’t find much diabetes among East Asians eating their traditional diet white rice, Native Americans eating corn, peoples of the Andes eating potatoes, Polynesians eating breadfruit and taro etc. Diabetes in ancient times was a disease of those eating like royalty, and in modern times a disease of those eating like ancient royalty.

      1. Darryl: Thanks for the reply and the links to those video clips. I’m a big fan of Jeff Novick and hadn’t seen those clips.

      2. The Zone Diet is carbohydrate, protein and fat balanced and appropriate. Eating a vegetarian diet will not be too high protein. And everyone better keep the starches limited cause you just can’t keep your blood sugar in the therapeutic zone if you eat high glycemic carbs in abundance even if they are whole grain and loaded with fiber. Forgive Dr Sears for acting like a doctor and telling people how to control blood sugar even when they eat CRAP Calorie rich and processed!

    5. Here’s the catch: high glycemic load diets promote diebetes, but so do high animal protein diets, and so does caloric overload. Hence, the SAD, combining all three attributes, seems like an experimental diet designed to promote diabetes. Sadly it isn’t. It is the SAD.

      Most traditional diets which rely on high glycemic index starches, like white rice or corn tortillas, use them in a way which minimizes their impact on blood glucose: they are always eaten together with plenty of vegetables, herbs and spices which provide fiber, acidity and phytonutrients slowing down the digestion of the starches and counteracting the adverse effects of high blood glucose.

      Stop eating refined and manufactured junk food, avoid sweetened beverages, limit your intake of animal protein (to no more than 20 g/day), eat plenty of vegetables, fruits, legumes, herbs and spices and you don’t have to worry about diabetes even if you eat some high glycemic starches as part of your meals.

    6. Neal Barnard looks real diabetic, doesn’t he. Not.

      Suggest you ingest some real science besides the Glycemic Index which, BTW, was invented by a vegan.

      How to Become Insulin Resistant ( The Paleo Way) [or The Zone Way, if you prefer]

      Part 1

      http://youtu.be/prdh62Qklvc

      http://www.plantpositive.com/35-how-to-become-insulin-resis/

      Part 2

      http://youtu.be/VYXEvTHnSAo

      http://www.plantpositive.com/36-how-to-become-insulin-resis/

      The way to rehabilitate a broken carbohydrate metabolism is with healthy unprocessed carbs.

    7. Carbs are a problem for me, I find a meat based diet keeps me balanced and not hungry for long time I can go almost all day without needing food and have a stable blood sugar. I tried the plant base diet and got very sick with colic. it was aweful and painful.

      1. Sounds like you need to soak those grains, beans, nuts and seeds for at least 12 – 24 hours in order to indulge in those plant based foods. There are really good instructions at Traditional Cooking School with #AskWardee if you want to try again to incorporate these. But root vegetables provide great resistant starch, potatoes beets, squash are good carbs that are much easier on the digestion. Going all day without food probably does cause you to produce cortisol stress hormone that makes your liver release the stored glycogen. You definitely need antioxidants from some plants foods fruits to counter animal food toxins.

  6. The notion that a single genetic factor would be determinative of something so complex and varied as digestion and nutritional requirements never made sense. More broadly, body typing systems in general (think Mercola) are similarly doubtful guides for nutrition.

  7. Thank you for this video. “Dr” D’adamo practiced in Portsmouth, NH several years ago. I am not sure if he is still there or not. My good friend is a nurse and used to work for this quack. He had her on over 20 supplements all of which HE sold in his vitamin shop. She was on this crazy diet and I remember her saying she couldn’t eat blueberries! I am blood type O so she told me I had to eat lots of meat. I told her “No, I don’t think so”! I have been vegan over 13 years and I am thriving. All my blood work is perfect, I have a ton of energy and feel great. My friend thought this “Doctor” was great. Thankfully she no longer works for him.

    1. You are not talking about Peter D’Adamo! He is the person who wrote the blood type diet book mentioned here. Who you are referring to is his father, who is a respected naturopath, not only here but in Canada and Europe as well. Both son and father do not share the same ideologies, However, I just want to point out that unless you have treated over 60,000 patients and gotten good results in healing these patients for years, you have no right to judge anyone!

  8. It is a shame when people “review” a diet they don’t take the time to look properly into it, merely reading the first book on the topic, which was merely an introduction, and looking at the millions of testimonials. And what about the fact that A’s don’t produced much stomach acid (and so can’t handle fats and heavy protein), and O’s produce a lot (and so can digest meat)? Certainly fits perfectly for me (an A) and housemate (an O). There are at least aspect about BTD that are spot-on and v. useful to know. Please do your research more thoroughly people. Why assume everyone is out to get you or just sell you stuff? Why the personal putdowns without looking into the guy? That is such a negative viewpoint and childish behaviour. Dr D is dedicated to helping people! There are so many testimonials to support this!

  9. It is a shame when people “review” a diet they don’t take the time to
    look properly into it, merely reading the first book on the topic,
    which was merely an introduction, and without looking at the millions of
    testimonials? And what about the fact that A’s don’t produced much
    stomach acid (and so can’t handle fats and heavy protein), and O’s
    produce a lot (and so can digest meat)? Certainly fits perfectly for me
    (an A) and housemate (an O). There are at least aspect about BTD that
    are spot-on and v. useful to know. Please do your research more
    thoroughly people. Why assume everyone is out to get you or just sell
    you stuff? Why the personal putdowns without looking into the guy? That
    is such a negative viewpoint and childish behaviour. Dr D is dedicated
    to helping people! There are so many testimonials to support this!

    1. Based on you post I’m not sure what makes you think Dr. Gregger’s is not thorough or that he did not look properly into it. Did you click on the links provided so that you could check the resources he used to come to his conclusions?

      1. I have been following D’Adamo and his work for 2 years and am in constant contact with people also following the diet. There is a lot to it. Not just the first book! People really don’t bother to do proper research bf. reviewing diets it seems.

    2. Testimonials are not science – could just be faith. Claiming that antigens of red blood cells has anything to do with acid production from parietal cells makes absolutely no sense. What about all the other systems RH, Kidd, Kell, Lutheran, MNS? Are they just ignored? Blood group phenotypes are messured in billions. Are there a billion different diets in the books? In my opinion this is not even pseudoscience – it is rubbish.

      1. But you haven’t looked into the diet obviously! The diet is customised as much as pos for each individual based on genetics, secretor status, as well as blood type! Please research first.

        1. Please watch Dr. Greger’s videos and follow his referenced links to the thoroughly done research into the diet before commenting.

          PS. I do understand it’s hard to admit being hoodwinked. Belief systems are intriguing phenomena.

    3. Debra…People are funny. They don’t wait for the “science” to go vegan. They don’t hesitate to eat garbage even though the “science” says it’s probably killing them. They don’t give a crap about the “science” behind the medications they take even though the side effects are horrendous and often a likely cause of death in many. But whoa…throw a diet at them and suddenly they are all about the science. Right.

      The thing about the Blood Type diet is that there IS science. A good deal of science that supports this way of eating. Dr D posts news articles seemingly monthly about nutrition “discoveries” that he’s been touting, based on science, for years. Even decades. I mean duh, humans can live on garbage for years, for God’s sake. This isn’t about living. This diet is about thriving and there are many people who, their entire lives, have never felt that good to even have a perspective on THRIVING.

      People are too lazy, too biased and too stupid to try this diet. If you want the science, STUDY IT. It’s there. Dr D makes it easy to find in his books, his footnotes and his website. If you want to sit in your nutrition armchair and throw blanket condemnations, fine! Do it! Nothing worthwhile in life is ever easy and it was a hard slog for me to finally find the blood type diet. I have a myriad of illnesses that are simply not part of my life anymore. I’ll end with a partial list of the things I no longer have:

      Heartburn and esophageal spasms where my next option was surgery. Heart palpitations with blood pressure spikes, gone. Vertigo. Symptoms of MS for which I was poked prodded, MRI’d, semi-diagnosed and sick of. Gone. Irritable bowel syndrome. Gone. Over 30 food allergies, no more symptoms. Asthma: I haven’t used my inhaler in 9 years. It keeps expiring. Athritis. OMG, where do I begin with my arthritis? A 45 yr old woman walking like a 90 year old. I would literally have been in a scooter by now at age 51 at the rate I was going. I followed Dr D’s arthritis recommendations to the letter and I am not just better, I am cured. I have never felt better in my life.

      All I had to do, you guys who want SCIENCE before you’ll even wipe your you-know-what, was change a few things on my shopping list. That’s it. Change a few things on my shopping list. DRASTIC, I know. The diet is free. They website is all you need. You don’t have to eliminate entire food groups. They help you with portions. They have recipe books if you aren’t creative.

      The only thing I can say to people who act like the noodges here: DUH! You are only hurting yourself with this zealot-like skepticism.

  10. Does anyone know if the dried barley grass and dried wheat grass are digestible by humans? I know that the “juice” is fine, but how about the actual fiber of the grass? Was told that humans can not digest grass, only the juice, but who knows. Thanks, if anyone has any input on this.

    1. Human don’t have the digestive enzymes to break down the fiber polysaccharides in the grass (or any other plant food). Most herbivores don’t have these enzymes either. Ruminants rely on the help of bacteria in their rumen to digest the fiber and get energy from it. However, the fact that in contrast to a cow you hardly get any calories out of leafy greens doen’t make them less healthful, as they offer a wide array of minerals and phytonutrients. You just can’t thrive on greens alone, like ruminants do, but have to rely on starches, fats or protein to supply you with the necessary calories.

      Regarding grass: I think it is very chewy and tastes awful. So why bother with eating grass, when you can have delicous and equally nutritious leafy green vegetables like, say, arugula or spinach?

  11. Great video, Dr. Greger. I knew the blood type diet had to be totally
    bogus. Now if there was only someone like you to help ferret out the
    lies in the skin & hair care industry. Oh wait. That would probably
    make most of the world economies collapse. We still need to prey on
    people in search of an anti-wrinkle cream purporting to be the fountain
    of youth in order to keep the economy going.

    1. Have you heard of Paula Begoun? She has a free database called “beautypedia” with reviews for most skin care/makeup lines. Very objective criteria e.g. pH, appropriate packaging, active ingredient concentrations, lack or presence of both irritants and anti-irritants, product claims vs ingredients with peer-reviewed sources to back up her critiques. Very helpful. Also has a ingredient-specific database so you can look up any of those on their own. She is very upfront about certain things being absolutely impossible barring surgery or other procedures. I have always thought of her as the Dr. Greger of skincare. :)

      1. Hardly so, Dr. Greger is not selling products it looks like Begone is… Was this a set up to get people to look at her site?

        1. If you’re not interested in skincare, The Dude, don’t go to her site. Nancy very clearly expressed a request for thorough research and critiquing of skin care products and ingredients, and I provided a resource I find to be extremely informative and useful. I find her to be much like Dr. Greger in that she provides peer-reviewed journal articles and cuts through the generally baseless and preposterous claims that most skin-care companies make. If she doesn’t have a peer-reviewed journal article to cite in support of a claim, she doesn’t make it.

          I don’t recognize your username, but if you read the comments sections here often you would see that I am a frequent commenter, not a one-time spammer. Like everyone else here, I enjoy offering commentary and sharing links and resources that may be helpful to other members of the nutritionfacts community.

          Frankly if I limited myself to only offering resources from those plant-based diet advocates who don’t sell anything, I would have to refrain from sharing recommendations for the Esselstyns, McDougall, Barnard, Fuhrman, Novick, etc…

  12. My husband is a cab driver and is going to college online. We have been vegan for 2 years now. We have tried juicing for 26 days. We tried Dr. Fuhrman’s plan for 6 months. We don’t eat anything processed. I make everything from bread, pasta to Spaghetti sauce and vegetable broth. I even make all of our cleaning stuff and shampoo and body wash. We have a garden that is finally producing we have lettuce, squash, Chickpeas, and chiltepine. He eats about 1,000 calories a day. I dropped 50 lbs as soon as we went vegan. Erik has not lost any of his 300 lbs. He is getting very frustrated and depressed. We also had all his blood work done and the results were great. Please help. Thank you

    1. I could be wrong but it sounds like he is not consuming enough calories. Baring any medical condition that prevents him from loosing weight he should be able to consume 1600 kcal’s a day and still drop about 2 lbs. a week. If he exercises he would need to consume even more kcal’s. Check out https://cronometer.com/ It should be able to tell you how many calories he needs to consume daily in order to maintain his health while losing weight. Also, if you can afford it he may benefit from one of Dr. Mcdougal’s live in programs.

        1. Well, I could not comment on that one with any authority. Not because I’m not aware of the illness but, it could be something really simple to something kind of scary and I don’t want you to worry needlessly. The right Doctor who practices lifestyle medicine (Dr. Mcdougal) could certainly help you.

          1. Jason I appreciate your help. This mystery is driving us crazy. Could you give me any ideas please. If we could afford to go to Dr. McDougall’s we would. The problem is that Erik sees me making everything myself and is frustrating that nothing is working. Knowing what we are working against would be a real relief.

            1. Debbie, I certainly would give you more information if I were qualified. If you search for illnesses that prevent weight loss on google you will come up with a list as long as your arm. In my opinion a list like this will not help point you in the right direction. Try searching your area for a healthcare provider that may be able to advise Erik much in the same way Dr. Mcdougal would. Here is the link where you can search for the closest health care professional in your area. http://www.drmcdougall.com/doctors/. Sorry I could not be of more help but I hope I have helped point you in the right direction.
              As I stated earlier I think the simplest thing to do would be to continue on the whole foods plant based diet and increase his calories to about 1600 per day. I understand how difficult it is to be active while carrying a full time job and school as I am currently in that boat my self. However, if Erik is able to find the time to engage in some moderate exercise it will probably help him with his weight loss goals and provide a positive way for him to relieve any mental stress he may be dealing with.
              Additionally, you may consider weather he is properly hydrated and resting sufficiently each night. I say all of this because stress can be a contributing factor to difficulty in weight loss.

            2. Debbie, your husband might be eating foods that he cannot properly digest. You say you make bread and pasta, Wheat is difficult for a lot of people. I have a very dear friend who has always made her own “healthy” whole wheat bread and she is obese. I believe there is a problem with wheat because it has been changed greatly due to modern farming practices:

              1) Modern chemicals used on crops might kill bugs, but the problem is, whatever bug-organ they target (stomach, digestive tract, lungs, etc) can also be hurt in people too.
              2) Modern practices do not allow wheat stalks to ‘mature’ in ‘haystacks’ like they used to… the wheat is harvested green by big machines, rather than allowing the grain to properly finish its development.
              3) Some crops might be genetically modified, and heaven only knows what the purpose of any particular genetic modification is… to make the grains ‘fatter’, in which case it also makes us fatter??? Lord knows, there is an obesity epidemic in the USA. Or, again, to kill bugs, in which case it might also target us for “the kill”??? To make bugs glow in the dark… and therefore, we will also glow in the dark???

              I make only sourdough rye breads (great for pizza!) and sprouted grain breads these days. They are easier to digest than flour-based yeasted breads. Sprouted grains can be crushed and then flavored in any number of ways – banana-date or garlic-rosemary or any other kind of popular or traditional bread. I make flat loaves on cookie sheets, baked at 250 F for an hour… Everyone who has tried them, loves them.

              I wish your husband the best of health… and you too!!!

          2. This is what I like about NF viewers/posters. The ones serious about the science say “I don’t know” when they’re unsure.. When they’re unqualified they say so. Most people don’t question their “facts”, beliefs and assumptions and don’t say I don’t know when they should.. Dr.Greger’s research/evidence based approach of questioning everything and going through everything and revising things often sets a great culture here of constantly seeking new knowledge + saying I don’t know. Intellectual curiosity + honesty! Love it :)

      1. A higher percentage of non starchy vegetables and fruits would be good, cooked and raw,… and some quality animal products. Be human,… fundamentally, for optimum health.

    2. Debbie: I had written out a nice long reply, but just before I sent it, I went back and more carefully read what you had written. I agree with Jason, 1000 calories sounds pretty low. I’m not a doctor or expert. I’m just going by what I have read about appropriate calorie amounts for adult men.

      One thing you may want to ask yourself: How sure are you about your husband’s calorie count? If your method of counting is off or if your husband is snacking at work, then getting too few calories may not be the issue. Just in case, I wanted to share with you part of the advice I had originally written. There is a free lecture on line called: “How To Lose Weight Without Losing Your Mind.” This is a talk from one of the experts from the documentary Forks Over Knives. It is an excellent talk and fun to listen to.
      https://www.youtube.com/watch?v=xAdqLB6bTuQ
      Dr. Lisle explains how to get enough food to feel full, but still have less calories. This talk may truly be irrelevant for your situation, but you might want to at least check it out.

      Another thought: Even though McDougall’s program is too expensive (believe me, I get that!), I wonder if there is a local doctor who is actually knowledgeable about good nutrition and who might be able to see if anything unusual is going on with your husband medically?

      I wish I had more help for you. I think it is worth taking a moment to acknowledge the great accomplishments that you have made so far. It’s not easy to change your diet the way that you and your husband have. The first order of business is to stop and congratulate yourselves.

      Also, I wanted to let you know that you are not alone. Many people seem to lose all or most of their extra weight when they switch to a whole plant food based diet. But not everyone does. In my own family, there is a couple very much like you and your husband. The wife lost a ton of weight and the much more over-weight husband hasn’t lost a pound–but his blood work improved significantly without any drugs. Sound familiar? (But in that situation, I know the husband is still consuming too many calories. So, the situation may not be exactly the same.)

      You may not have reached all your goals, but you are totally on the right track. I feel like/hope you are both almost there. Please report back and let us know how it goes. We’ll be rooting for you.

    3. Debbie, I would like to add something to the excellent replies to your post. For a very small investment you may obtain Dr. McDougall’s wisdom and experience from this book:
      http://www.amazon.com/McDougall-Program-Maximum-Weight-Loss/dp/0452273803/ref=sr_1_3?ie=UTF8&qid=1396577777&sr=8-3&keywords=mcdougall+plan

      Also, Dr. McDougall has posted his program for free on his website:
      http://www.drmcdougall.com/health/education/free-mcdougall-program/

      On a personal note, I have been vegan for going on three years and have really narrowed down my food choices to whole foods, using Dr. Greger’s website as the best resource for selecting the best foods for the best reasons. That said, I have lost a few pounds and my numbers have improved, however I am still overweight and the reason is simple: I take in too many calories. It’s a process for me and I won’t give up trying to find the balance point of good food and adequate nutrition. Your story is an inspiration. Keep going!

    4. You could join Furhman’s or McDougall’s forums if you haven’t already. Furhman’s costs money, different costs for different “levels” of access to the forums and to him basically. Which kind of rubs me the wrong way, but anyway. McDougall’s on the other hand are free and in my experience much more active and interesting. Jeff Novick posts on there and replies to inquiries regularly. And he has a very ‘by the numbers’ take on nutrition. I would be interested to hear his take on your situation. Worth a shot.

  13. FYI : the D’Adamo diet was based on/a rip-off of Ayurvedic medicine…pretty heavy stuff,indeed…compare this to the modern ‘scientific’/pHarma studies… [which we all know are legit]

  14. So sad, but the company I work for just started a weight-loss program completely based on this book. Last year it was Herbalife. I wish they would do some research before promoting these unhealthy programs to employees!

    1. Jen: I agree that it is really sad. I have a similar problem where I work.

      Here’s what I was thinking about a plus side for where you work: If they are willing to try all sorts of wacko programs, then they might be willing to try a real evidence-based program too. In other words, if they can’t distinguish a legitimate program from a bad one, they have no good reason to reject a legitimate one. So, *maybe*? after they get the blood-type program out of their system, you could convince them to look into the PRCM program for companies. (You can start by looking up the PCRM info on the Geiko study if you are interested.)

      Just a thought. I tried this where I worked and it didn’t fly. :-(

  15. Despite your rejoicing, the PLOS study on the Blood Type Diet was far from an adequate representation of the diets. You can see the problems with the study criteria here (http://www.datapunk.net/plos-btd/data.html) and a blog entry discussing the study’s severe shortcomings here (http://n-equals-one.com/blogs/2014/01/24/kicking-bubbles/).

    In essence, a look at the core data used in the PLOS Study debunking the Blood Type Diet (BTD) finds support for the researcher’s conclusions that if your experimental subjects eat potato chips, sandwiches, pizza, ‘beans,’ mac-and-cheese, French Fries and processed meat products while doing 13.7% of the Blood Type Diet, their final cardiometabolic markers will probably not vary much by blood type.

    1. Dr. D’Adamo:
      Let’s put the study aside for a minute. Do those patients who follow your type O diet have an increased risk of CVD/DM2? Or not? It is clear, based on the evidence, that animal foods (yes even organic, pasture raised etc) contribute to the aforementioned diseases, including cancer…. but I’m interested in your perspective.

      Thanks

        1. It should be fairly obvious that there’s a high likelihood that Pete was just here to drop a rhetoric bomb as a support for the dogmatically-driven true believers (possibly including himself) to keep believing. If Gregor’s point about the unfulfilled promises of Scientific Studies is true, then it shows the intellectual dishonesty at the root of the movement; in this case, the D’Adamo clan itself. If you make a public claim that you are conducting valid research and don’t follow up with at least an explanation of why the research failed to be as valid as you thought it would be, it’s hard to see how serious you are going to be in discussing information that may cast a disconfirming shadow over your theory.

    2. God, looking at the study, they allowed biscuits, pizza, processed meats! etc How can you compare this study with BTD? The researchers didn’t even bother to study the diet properly to find out what it’s about before embarking on it! So annoying, waste of money and not helping the public! Makes you wonder if their motivation was “pure”!

  16. I don’t know what anyone is talking about! Eat right for you blood type is real!!!!! Real I say. Must I say it again?
    Okay it is not real, LOL! I am Type O and I am supposed to do best on a meat diet. YEs, I a am primal man. I bang my chest with both hands. ME MAN! ME MAN! Bahahahahahaha. I eat a whole food plant-based diet, high in carbs, moderate in fat, and low in protein. I haven’t been sick in over 2 years since I adopted a plant based diet. I never though I would eat a plant-based diet, it is just something I happened upon. I have been cutting out meat in different points in my life, from pork to beef to poultry to fish. Each time I cut something out my body responded in a good way. I still got sick though, until I adopted a plant based diet. For my blood type I should be dead though. Good thing I didn’t listen to that blood type stuff.

    1. Another type O here. Am doing just fine on a whole foods plant based simply prepared way of eating. Much healthier than when on animal products.

  17. Thanks for this video! I also read this book in the past and thought it was plausible.
    It would help a lot if you could also make a video and actually name some stuff he wrote which was just not scientific and untrue. Then I will transalte it and show people who believe him.

  18. I love when I see a Doctor do a report on another Doctor’s diet, and immediately following the report it says “I also wrote a book “click here.” So basically, Dr. Greger cherry picked articles against the BTD, just so he can get his name known…… Unreal….

    1. Hi Kay, I’m not sure if you watched this video, but the research stated in the video was the only scientific review of the evidence for the blood type diet. That’s not cherry picking, it’s using the only peer-reviewed research available. It sounds like you’re thinking Dr. Greger is advancing some sort of agenda?–maybe you didn’t see that his book on carbs is available for free, whereas the blood type diet book has sold 7 million copies. Dr. Greger founded NutritionFacts.org under the belief that he would review the science and let people decide for themselves. I hope that clarifies the picture for you. :)

    2. HI Kay, you may know this but in case you don’t: All speaking fees and proceeds Dr. Greger receives from the sale of his books and DVDs are all donated to charity. And the book, he mentions here is free to all.

  19. This is somewhat of an unrelated question and I do currently donate blood for purely altruistic reasons…but from strictly a health perspective…Regularly donating blood…Harmful?…Harmless?…or Helpful?

  20. As I’m currently researching this, and will read the book soon, I’d like to point one thing out. The research mentioned has the following conclusion:

    “Sixteen articles were identified from a total of 1415 screened references, with only one article that was considered eligible according to the selection criteria. The identified article studied the variation between LDL-cholesterol responses of different MNS blood types to a low-fat diet. However, the study did not directly answer the current question. No studies that showed the health effects of ABO blood type diets were identified.”

    “No evidence currently exists to validate the purported health benefits of blood type diets. To validate these claims, studies are required that compare the health outcomes between participants adhering to a particular blood type diet (experimental group) and participants continuing a standard diet (control group) within a particular blood type population.”

    The conclusion is that there is no study that has been done. Thus, there is no evidence pointing EITHER way.

    One trend that I see among many westerners is the quick jump on calling things pseudoscience when they don’t agree with it (take chiropractors or Chinese medicine for example).

    For something of this calibre, a long-term study, with many subjects, would have to be done in order to “prove” it through means of a study.

    I’m in no way saying the blood type diet is or is not valid. However, just as one shouldn’t jump on board and take it as truth, one should not instantly call it pseudoscience because they don’t agree with it.

    That being said, I’m glad to see this video out. It’s good to see the other side of the issue.

    1. karl: Dr Greger will be releasing a series of video on gluten very soon for more info on this topic. (Keep an eye on the videos-of-the-day) In the mean time, check out this video, ”
      Alzheimer’s Disease: Grain Brain or Meathead?”http://nutritionfacts.org/video/alzheimers-disease-grain-brain-or-meathead/

  21. How is this article even remotely close to the blood type diet being debunked? You’re only advertising your preferred books. You’re not citing evidence gained from science, or the evidence gained from the science of others.

  22. Dr. Greger didn’t mention even bigger figure among the blood type diet specialists, DDS. MS William Donald Kelley, which would contradict his ‘debunked’ message, even more. Some information about Kelley’s works can be found at: http://www.dr-gonzalez.com/history_of_treatment.htm or even better in Ty Bollinger documentaries “The Truth about Cancer’, or in few of his own books. Since different blood types contain different antigens on their surface, frequently glycosylated (except for type O), their essence is related to the response of the immune system. Every bug in our guts reacts constantly with the surrounding load of nutrition, and sugars are the number one resource for them. So logically, it would make sense that our immune (through blood system connection) system can affect the digestion (in particular in case of leaky gut). Dr. Kelley healed himself and many, many patients applying his experience. So Dr. Greger, please take your Hitler comparisons, away when you talk about people who did great research while helping others. You certainly learned in the school, that Hitler was killing, not healing!!!

  23. Ok, I am doing a bit of research here. I know not much of the two topics but as I read all the comments here I couldn’t help but notice people mentioned eating large amounts of a certain food on the blood type diet. So I am confused because of this chart
    http://treelite.com/proddetail.php?prod=CH-3 . It gives you a basic run down of foods good and bad. It never said to eat one thing over another except that leafy greens are very good for you and small portions of meat! I tend to agree with this and I have had a food sensitivity test done a year ago so, I was looking at the foods on this list to see how my personal allergies and sensitivities blend or don’t. I have sensitivities and allergies aligning with the avoid lists, but only one food type that is considered neutral. I can also eat some things on this avoid list that are not on my sensitivities list too.It sounds like a reasonable chart to me. I personally think if we were meant to be “veggies only” humans we would not need to consume or utilize b12. I know it can be consumed through earth but life can go unwell for many as soon as it runs low and it isn’t easily found in veggies sources. I don’t think people will want to have to be strategic about finding specific food sources. I do believe we all need to consume some small amount of meat. Fish has some of the best b12 sources and (red meat may give blood issues) but most fish do not. I am not the most religious person in the world but right now the words ( I will make you fishers of men ) comes to mind. So, is there a diet that consists of mostly raw vegetation and fish and if so where is this research? As far as grains go idk because we as humans today eat so much and it is processed whether its glutenous or not. should we for go them or just eat them whole if we cant digest something whole then we should not be eating it. what do you think? I know this is all over the place i a just thinking aloud looking for answers…

    1. Why do “experts” feel such a need to compete with one another? It’s obvious to me that each has a piece of the puzzle, but without the others, the puzzle is incomplete. Competition… See Candace Pert’s book “Molecules of Emotion” – she talks about the rabid competition in the sciences.

      And, I am well aware there is a movement afoot to popularize eating meat – human flesh, even. But nature has ways of teaching us not to eat our own. See a video I made about “Hillary Clinton’s Mysterious Malady” – https://www.youtube.com/watch?v=__UQQEHuRws . Best to avoid meat altogether if you are able, because you don’t know what is really in the meat you buy from stores or are served at dinners with very “special” people… you seriously don’t know. See KerthBarker.com for his book, “Cannibalism, Blood-Drinking and High-Adept Satanism”. His stories are sad but true.

    1. Unable to access this link. Says you need to sign up to be a member. Thanks for your other links that were accessible. I love Dr.Gregor, but I question anyone who claims to be an expert on everything about diet and health. I personally have benefited from the info in the blood type book.

  24. The science behind ERFYT

    http://www.dadamo.com/science_critic.htm

    on ‘first blood type”

    http://www.dadamo.com/forum/archivea/config.pl?read=75037

    Some studies.

    First, different levels of
    IAP

    http://www.ncbi.nlm.nih.gov/pubmed/16412386

    Type A neutralizes IAP

    http://www.ncbi.nlm.nih.gov/pubmed/7449139

    Response in humans is
    probably the same, but for example this would explain why people with less IAP
    benefit from lower fat diets

    http://ajpgi.physiology.org/content/292/5/G1439.full

    If you get the gist, IAP
    works in conjunction with other things, such as enzyme CD36, to transfer fat
    across the mucosa. The thing is that what is being transferred can be different
    structures of protein, different lengths rather. In other words it decides what
    type of fat makes its way into the blood.

    http://generativemedicine.org/blogs/dadamolab/?p=23

    See the link below and the
    quote from Dr. D:

    http://www.drpeterjdadamo.com/wiki/wiki.pl/Intestinal_Alkaline_Phosphatase_(IAP)

    1. Hi, I did a quick search and was not able to find any peer reviewed studies either justifying or debunking diets based on metabolic typing. As the wikipedia article you referenced says, metabolic typing was first introduced by a dentist named William Kelley who was very controversial in regards to his claims of curing cancer with a dietary protocol that was based on metabolic typing. His work was later continued by the late Dr Nicholas Gonzales who was a Sloan Kettering trained immunologist (who’s books I have personally read) and who published several cases (albeit not in peer reviewed journals) where he treated cancer successfully using a dietary protocol that utilized the metabolic typing protocol that he says was passed on to him by Dr Kelley. Having looked into Dr Gonzales’ work, the thing that was always suspect for me was that he never revealed the full “secret” of the process he used to determine a person’s metabolic type, although he alluded to many aspects of it in his writings. His protocols also used a very large amount of dietary supplements which were of sold through or by him to his patients. Dr Gonzales died unexpectedly last year and to my knowledge his practice in New York still continues to be run by his long time partner Dr Linda Issacs. As for the links that come up when you google metabolic diet, they all appear to be gimmicks of some sort that may have a foundation in line with the Kelley protocol but that are selling you something whether it be supplements or a “program” of some sort. I would steer clear of them for that reason and stick with the only diet that has been shown scientifically to treat or cure any disease, a whole foods plant based diet.

      1. Thank you. This is a pretty huge thing actually. There is a lot of confusion about metabolism and the metabolic typing. This is why I am interested.

        A significant part of the “alternative” world (naturopaths, holistic nutritrionist, etc.) advice patients referencing their metabolism or metabolic type. How many times haven’t we heard: “Oh I should eat protein for my metabolism” or “I have to start the day with protein to start my metabolism”.. Etc…

        This notion of “metabolic types” needing different dietary patterns (i.e. metabolic typing diet) is carried forward by the media and is living full blown in the public. I would love to see a Greger Debunk of Metabolic Typing Diet, as I think it is severely needed to put this straight.

          1. Is there a way to get the Greger Teams attention to prioritize this? (even though they are already doing a wonderful, amazing job and have tons of great videos coming as well as in the pipeline already probably).

  25. It appears tha people with Type O + blood may be at a higher rislk of breast cancer as indicated in a new study in the International Journal of PharmTech Research, Vol.9, No.10, pp 221-225, 2016: “A Relationship between Breast Cancer and the ABO Blood Groups”

    http://scholar.google.com/scholar_url?url=http://sphinxsai.com/2016/ph_vol9_no10/1/(221-225)V9N10PT.pdf&hl=en&sa=X&scisig=AAGBfm1zaI5A-N6RngmCkjRdT8Gsuvec5g&nossl=1&oi=scholaralrt

  26. Observational research should prevail here. Blood types correlated with geographic regions and thousands of years of those populations thriving on their diets is a common sense approach observational approach. Alas, the scientific method of hypothesis testing is full of weaknesses, such as bias in the questions asked. If we relied more upon observational research, the vast fluctuations in conclusions would not be ocuring at the expense of the public’s health. I’m a Ph.D. in Anthropology.

  27. Evеry weekend і used to visit this web page, forr the гeɑson that i want ᥱnjoyment, for the
    reason that thiss tthіs web paage conations really nice funny stuff too.

    1. Well, the blood type diet guy is a little close-minded too. Seems a lot of people feel a need to be unquestionable – the one and only authority. If they would all work together, miracles might just happen in the health of this nation. As long as all these good people feel they need to protect their turf and compete for customers, then all that energy dissipates into nothingness. It could be used instead to help uplift us all. Fact is, people are different. What works for one doesn’t work for another. Everyone needs to 1) clean out all addictions from his/her diet: drugs, refined sugar, refined carbs, processed foods, etc… so he/she can get accurate messages from the body, then 2) listen to the body’s messages and 3) test them… do they work or not? It’s not rocket science.

  28. I was skeptical about the blood type diet 20 years ago when it was first proposed to me for my son. Two months prior, my 2 year old son had started having seizures, increasing in severity and occurrence. We had taken him to a doctor who was a regional specialist for epilepsy, and he was prescribed meds. This doctor had told us that our son would be on seizure meds for the rest of his life, and prepare ourselves for him to be wheelchair bound as well. We asked about the ketogenic diet, as one of our son’s in-home therapists had told us of it being a god-send for her 4 year old daughter, who had exhausted all available seizure medicines, without sustained success, before the doctors had tried the keto diet as a last effort. Our doctor was unwilling to try the keto diet, until all other medical treatments were exhausted. We, on the other hand, wanted to try diet (it’s just food), and sought a “natural” doctor, who recommended the blood type diet.
    Being skeptical, and armed with only a biology degree, I needed something more to go on. This doctor gave me the eat right for your type book, and based on it’s theory that blood types seem to correlate to specific food sensitivities, we gave it a try. Our family was all type “A”, so everyone in our home went on the diet (at first). Not only did his seizures stop within 2 weeks, he was clinically discharged 3 months later, as he had a clean EEG. The doctor was really upset that we didn’t follow his advice. Our son has been seizure free, and seizure med free for 20 years, excepting a hospital visit, having to go to the ER when we woke up to him having back-to-back seizures every 3 minutes. We found the evidence of him helping himself to orange juice in the middle of the night, and he was back to normal after 4 days and released from the hospital. Today, he can eat anything, although we avoid making the “avoid” foods a large part of our diet. And he is far from being in a wheelchair.
    As far as the effect on me, I had chronic acid reflux before we went on the diet, monthly bouts of sour stomach and diarrhea. They disappeared completely, and today only occur when I eat more than a little of the “avoid” foods. I know people with other blood types that did not notice any benefit from the BTD, but our experiences have been significant enough to believe there may be something to the food sensitivity – Blood antigen type diet.

    1. Well done, and kudos for taking the initiative to give ‘a go’ to yet another of the enormous number of successful Healing Methods we have at our disposal.

  29. Jeez. I looked up to “Dr” Michael Greger for intelligent analysis. I’ve never ever read such rude or sloppy “debunking”. Did he need to bring Hitler and Mein Kampf into his discussion?
    How has Dr Greger – who has said on YouTube that he pays at least 10 people to read all the scientific literature being produced – missed the research showing that humans fall into 3 categories or familes of gut bacteria? How has he missed the info that “secretors” secrete blood type sugars, which affect the composition of the gut bacteria? How has he missed the research showing that the mucus of our guts contain blood type antigens – which affect the composition of bacteria in our guts? How has he missed the 3000 year old ayurvedic medecine that separates people into three groups – each benefitting from slightly different diets?
    As Deng Xiaoping said – it does not matter whether a cat is black or white so long as it catches mice.
    Quite a bit of what D’Adamo says is hocus pocus. A blood type diet will help you avoid cancer, but once you have got it it won’t cure you. But for me the diet has improved multiple conditions in my body, and some of them largely caused by a single kind of food. So long as you eat sensibly and avoid really rubbish food (the american diet?!) most people can eat anything we call “food” between the ages of 18 and 45. As you get older everything in your body works less well. Your intestines, your kidneys, your liver etc etc. After the age of 65 you probably benefit more and more from eating less animal food. From 90 years on it might be best to avoid animal food except in little quantities on special occasions. And the blood type “avoids” become increasingly important. Because your intestines become “leakier” as you age.
    At what point is Dr Greger going to discover this, and apologise his extraordinary and unnecessary rudeness?
    Humans do have blood types, and your blood type does affect the composition of the bacteria in your guts. That is a fact. Forget D’Adamo. Go look it up – it is not that easy to find on the net, but the science is coming in, from Israel, Finland, Germany and the USA. And probably many other places.

Leave a Reply

Your email address will not be published. Required fields are marked *

Pin It on Pinterest

Share This