Doctor's Note

I’m fascinated by how complicated such a simple question can get. The take-home is that water is the healthiest beverage, followed by tea.

The effects of coffee on cancer risk are more salutary:

It also matters what goes into the coffee. A new video next week on aspartame and brain function will explore the potential benefits of coffee in reducing suicide risk, which may be undermined by the addition of artificial sweeteners.

I’ve previously covered Walnuts and Artery Function and Dark Chocolate and Artery Function.Stay tuned for a few more coming up further exploring the effects of tea, olive oil, and plant-based diets on our lovely endothelium.

Low Carb Diets and Coronary Blood Flow is one of the few other studies I’ve done that measured blood flow within the coronary arteries themselves. For more background on the brachial artery test, see my video The Power of NO.

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  • Merio

    So, if i have understand correctly is better to drink deca coffe and (black, or green) tea right ?

    What about the deca process to minimize caffeine ? Are there solvents involved ?

    • Wade

      It depends on the process. Swiss water process or Mexican water process uses only water if I understand correctly.

      • Merio

        Thanks for the reply.

    • tbatts666

      Doesn’t decaffienation remove antioxidants? Not that it is a big deal if you eat your fruit & veg anyway.

    • Sandy

      Buy Swiss Water processed coffee. It is a patented process that uses only water to remove caffeine. No chemicals whatsoever. Also another side benefit is that SWP Decafs generally indistinguishable taste-wise from caffeinated coffee. Grocery store decafs will be almost certainly be chemically processed using a benzene like fluid (dry cleaning fluid). I buy mine online here (look for the green logo with “SWP” :

    • gr

      It’s heated to high temperatures to extract the caffeine which destroys some antioxidants.

  • elsie blanche

    Great topic. And timely for me. I just read in Dr. Neal Barnard’s book that he feels that tea consumption should be limited due to “significant” levels of aluminum in tea. I know that that there are different beliefs on this, but Dr. Neal Barnard is highly regarded in this community, as well as amongst many other vegans I know.

    • veganchrisuk
      • elsie blanche

        Yes, I’ve watched this video before, and took it into consideration. But I also take into consideration the fact that not all people excrete/eliminate things as effectively as others, and that so many diets out there are dense in fat, primarily saturated fats, and these fats might somehow increase intestinal permeability, allowing aluminum into areas of the body where it does not belong, before the GI tract/organs have even had a chance to eliminate the aluminum. For Dr. Barnard to state his message so clearly, it is enough to make me pause and consider that there are many different views, and that maybe tea is simply not for everyone (as far as aluminum safety).

        • veganchrisuk

          Hi Elsie – I’m not from the medical profession so I wouldn’t know – just thought the video would be of use.


          • Matthew Smith

            A study in Japan found that drinking green tea is a factor in Asian longevity and that each daily cup of green tea can add a year to your life. Those drinking five cups gained five years, living to 80, those drinking ten cups lived to 85 years, gaining 10 years. There was more of a benefit for women than men. Can you imagine drinking five or even ten cups of matcha a day? This site seems to recommend 7-10 cups of tea a day, and matcha as well. Do you think that tea limits you to ten years beyond average? This would be about one to two standard deviations above normal for Japan. Many of the doctors described here who are vegans live to 93 or later. How do you think you could gain two or even three standard deviations of years to your life, knowing that 70 percent of lifespan could be implied to be environmental? By eating a plant based diet, not smoking, getting exercise, and staying trim. Perhaps by eating the healthiest foods and dosing antioxidant rich foods throughout the day and maintaining a healthy mood we could get to 93. Demographers today believe that the average Australian girl born today will live to 100. There is a way to make that true for you too, we think it is beans, nuts dark chocolate, green tea, whole grains, berries, fresh fruits and vegetables. We think the famous cultures of 100 year olds have some common characteristics. Not eating meat, drinking light alcohol, lots of fresh vegetables and fruits, light fish consumption, and eating less are all common traits. Perhaps its simpler, perhaps they all eat peanuts. Perhaps beans could be more powerful than that. Picking carefully among these fruits and vegetables, as this site makes possible, could extend longevity and reduce health burden.

          • veganchrisuk

            Just let me know as soon as you have the answer…….

          • Matthew Smith

            If the largest study of it’s kind, Harvard researchers found that nuts make you immortal. In all seriousness, eating a walnut a day could add ten years to your life, which in addition to green tea, could profoundly add to life. The benefits of walnuts mean that they should be in every diet. Some people were recommended a 1/4 cups of nuts a day. The benefit of nuts was so profound, some people think maybe three hand fulls of nuts a day would be better. Lora Dunning researchers found people who replace 200 calories with 14 macadamia nuts lived longer and better. There were similar results with pistachios and peanuts. Whole grains were just as protective. Dr. Greger said that eating four bowls of oatmeal a day could dramatically improve your lifespan. The only thing more effective than nuts is beans. Even string beans or peas should be in a daily diet. Black beans really add to life. Peanuts are a nuts and a bean, maybe they add life to all who eat them daily, knowing that people think of them as an indulgence. Those who see them as the spartan item they are, and eat them with others live longer (like those who eat peanut butter, much longer lived people). Dark Chocolate also virtually destroys your ability to get heart disease. I think the only problem with nuts and dark chocolate is trying to manage the saturated fat. Beans, nuts, whole grain, green tea, dark chocolate, berries, fresh fruits, and vegetables can glean live for all cost effectively.

          • veganchrisuk

            English walnuts being the best variety for fighting cancer –

          • Betty

            I eat all the supposedly heart attack proof foods. Still had a heart attack and heart disease in my late 40’s. There just aren’t any guarantees in life.

          • Matthew Smith

            I am so sorry to hear about your heart disease. Thank you very much for eating all the heart healthy foods. They perhaps made your heart attack more survivable. If eating beans cuts your risk of heart disease in half, if drinking tea cuts your risk of
            heart disease in half, if eating nuts cuts your risk of heart disease in half, if eating whole grains cuts your heart disease risk in half, if taking an aspiring a day cuts your risk of heart disease in half, if drinking one drink a day cuts your heart disease risk in half, does that mean if you do all of them you have 1/64 the risk of heart disease? Add dark chocolate for 1/128 the risk? Add kiwi for 1/256 the risk? Add exercise for 1/512 the risk? Apparently it does not because there are no guarantees in life, as you say. However, there are superfoods that can add to the benefits of the food you already eat. Foods like green tea, mushrooms, black raspberries, nori seaweed, walnuts, black beans, peanuts, sweet potatoes or pumpkins, garlic, broccoli, and others that can bind in health benefits. Dr. Greger said that you can be 14 years younger on the plant based diet, exercise, losing weight, and not smoking. He said some Vegan men have had their semen tested at more than 30 years younger! Beans, nuts, dark chocolate, whole grains, berries, fresh fruit, and fresh veggies can add to heart disease survivability. For heart disease, this site recommends nuts, whole grain, beans, cocoa, exercise, and fresh vegetables like garlic and fruit like apples.

          • Gina Tomaselli

            Only raw cacao (i.e. 100% chocolate without sugar) is beneficial, not dark chocolate. Sugar is bad for you in every way,and dark chocolate has sugar in it – Dr. G has posted many videos about this. Nonetheless, I enjoy my dark chocolate and ice cream and desserts in moderation, because I have no desire to live to be 110 and because indulgence in moderation is good for the soul. That’s just me, however, and I say that because I have amazing blood pressure levels, my EKGs are off the charts, and I have no real red flags in my family history.

          • dealwithme

            Caucasians are not Orientals. What may work for one race, may not work for another!! Having said this, my father was a living garbage disposal. He eat everything, including fat. Drank his beer or wine, smoked his cigarettes and died of the age of 85. Never had high blood pressure or any other illness!NEVER gained an ounce after the age of 25. He was however hard of hearing! What my father did – was walk every day for 2 til 3 miles until the day he died! My mother on the other hand – never smoked, had on occasion a glass of wine, eat red meat only once a month, drank herb tea all day long, took a daily short walk and loved spending her days in bed. She was also a very healthy *hypochondriac* who passed away at the age of 84. What I am trying to say – eating healthy is always good within reason. Your longevity is determined by your genetic makeup as are certain diseases! The irony is – one day coffee is very unhealthy and cancer causing the next day it is healthy. As were eggs now they are healthy, as was butter now it is better than margarine. I am 72 never had high blood pressure in my life or any other illnesses! I am however about 15 lbs overweight for my heights. I drink 2 pots of coffee a day, no problem going to sleep. I do not drink alcohol but I smoke! I am not crazy about red meat but when I eat it, it has to be cooked rare. I LOVE VEGGIES and Salads! Some fried chicken, fish and pasta! HATE hamburger, hot dogs, chips, sodas – what you call junk food. My philosophy – eat what you enjoy- forget all the other BS – but eat in moderation. BON APPETIT – Did I mention I hate exercising and taking long walks?

          • Richard

            Sounds so great but how did they know when they would have died without the tea? They did not of course…

          • Matthew Smith

            They did not know that they would have died earlier without the tea. The idea is that tea fights inflammation, oxidation, wear and tear, dilation, clogging. diffusion, inconstancy, erratic changes, uneven pathways, stress, damage, missing chunks. nerve movement, and pain. The more of it you drink the more it reduces damage inside of you, the more it keeps you whole. Perhaps friends have commented on feeling fitter after eating some nuts or drinking some tea. This benefit really adds up, as opposed to letting medicine really break down when people are sick to let them get better. Is that an okay paradigm for medicine? To let the fittest survive, to let those invest the most in their health stay the fittest? The economics of medicine. I think doctors have to treat all patients the same but they should be very diligent in telling everyone to try to prevent all disease with the most plant based diet, exercise, not smoking, and losing weight. Drinking more tea, eating more beans, and eating more nuts based on how you feel can dictate your health. As you say, people don’t age without some sort of stressor and that stressor isn’t always time or space, but all people can respond to it to prevent disease with adaptogenic (stress relieving) plants like tea, nuts, beans, whole grains, berries, fresh fruit, and vegetables.

          • jj

            Do you know if Green Rooibos Tea (Aspalanthus linearis) has the same health benefits as Green Tea? It is unfermented and very palatable whereas I don’t enjoy Green Tea.

          • Matthew Smith

            Hello, Dr. Greger highly recommends Rooibos tea on this site, saying it is “wonderful stuff.” It has many of the same health benefits and none of the caffeine as green tea. It has anti-aging, anti-oxidant, and heart health properties superior to green tea. I have read that green Rooibos tea has many times as many antioxidants as you’d need in a day. You could certainly drink it instead of green tea. It is a delicacy in Japan. I actually think we should campaign for green rooibos matcha, Green rooibos is a bean and a tea, making it an ideal health drink. Rooibos tea is relatively new to the health sciences so long term benefit is difficult to assess or unknown. Perhaps it will take many years to show that green rooibos is better for you then green tea, but for now it is just as healthy. Drink 5 to 10 cups a day instead of any other beverage you’d like as you wish.

          • Matthew Smith

            According to this site, green rooibos has 100 times the antioxidants you’d need in a day.

          • jj

            Thank you for the information. I bought some from Mtn Rose Herbs but had forgotten about it. It will be a great warm drink for the winter.

          • Betty

            Where do I find de-alcoholed wine?? Haha

          • Keithesaf

            Grape juice..

          • Betty

            Juice is bad for you.

          • gr

            grapes are evenbetter

    • Hi Elsie, did he mention what the limit should be?

      Dr. G covered this interesting topic here:
      His analysis comes out pretty much “no worries”

      • elsie blanche

        He simply stated to “minimize the use of tea.”

        I’ll be offline for the rest of today, so if anyone replies I won’t be returning until to this post until maybe sometime later this weekend.

    • marysaunders

      Another issue with tea is fluoride, which can cause all sorts of problems in the body, depending on the individual, and depending on buffers such as milk. Pineal gland, thyroid, and kidneys are at special risk, from my last research on the topic.

  • Filipe Coimbra

    In know that this is really off-topic, but I invented my best friends for a christmas dinner at my new place, and almost all of then are meat-eaters. So, I wanna make a great a delicious dinner with only whole plant food for convincing that it’s delicious eating this way. Anyone have a secret recipe that can share with me?

    • Mike S
      • Filipe Coimbra

        hmm… sounds great! I will make one this week to give it a try :)

    • Cartma

      yes. I advise you do all that and also have a barbie in the back making the flesh crispy on the outside and tender on the in so they can eat what they feel they need, and puruse the other delectables. deny them the meat and they wil feel slighted and hungry and in the end annoyed or angry you fed everyone else and left thme judged and starved and shamed since they do not even merit consideration in your mind. Like a christian who makes like they accept you though you think you have the truth they do not, pretends to be friends just to convert them. Seems manipulative and passive aggressive and unfriendly. I’m a grain free vegan and my meat eating friends LOVE everything I make, but they want it with meat because that’s how they feel fed. And they always think of the health benefits eating from less meat, and get to contemplate how awesome all the other food there is to eat is. . . . my 2 cents.

      • jj

        My friends and relative know that I do not use meat and if they want it they are welcome to bring their own already cooked. Just as I take my beans to their gatherings. No problem.

      • Filipe Coimbra

        As JJ said, I also told them that they can bring their own food if they want. In my house I don´t cook meat (not only because of human health issues, but also because of the environmental situation of our great home (planet Earth).

    • Sunshine99

      Hello Filipe, Chef AJ has a video of holiday dishes to make that are delicious, eye-appealing, and tasty to omnivores. Her hearty lentil loaf is great! Below the video, click on “show more” where the notes are to see the recipes printed out.

      Another idea that is easy to prepare is to use Butler soy curls.
      I rehydrated and cooked them in veggie broth with some herbs and diced onions. Then add favorite barbeque sauce and you’re done. They look and smell like pulled pork or chicken. Serve on a bun with some cole slaw and everyone will be happy. I made these for my daughter’s new Texas relatives at her wedding and they were a big hit. Great prepared and served in a crock pot for a low-stress holiday buffet.
      Good luck!

      P.S. Yes, we also love Cheater Pad Thai mentioned by Mike S. Make the sauce and add lots of veggies, such as bok choy, broccoli, cabbage, bean sprouts. Squeeze lime juice on top when all is assembled. I serve this over plain brown rice instead of rice noodles; filling and easy to prepare.

      • Filipe Coimbra

        Sounds great!

        • b00mer

          I agree with Sunshine and Thea, a lentil loaf is a great idea. My personal favorite is Dreena Burton’s. There are lots of ingredients but most are seasonings and it comes together pretty quick and easy in one pot.

          I made fatfreevegan’s Mushroom Seitan Roast for thanksgiving, and while it’s a great recipe and I would highly recommend it, at the dinner table to be honest I kind of ignored it, as I was much happier to fill up on all of the sides. I had mashed white potatoes, mashed sweet potatoes, stuffing, cranberry sauce, a side roll, mixed sauteed veggies, corn, all topped with delicious and super easy blended bean gravy:

          People love starch! Fill em with starch and you’re off to a good start. For another “entree” style recipe, Isa Chandra’s lentil stuffing burgers are another favorite of mine. Instead of eating them as burgers, I prefer to eat them on their own as patties with gravy, mashed potatoes, etc. Personally I omit the oil, use commercial bagged bread cubes (which I believe prevented the sogginess issues some of the commenters had) and use walnuts instead of hazelnuts.

          Good luck! I’m sure whatever you end up making it will be delicious. Have a great holiday :)

          • Filipe Coimbra

            Thank you b00mer! I will take a look at your options. After the fest session, I will try to tell you what was my options and the results.

          • Thea

            b00mer: Thank YOU for this post! I have made a bunch of recipes from Let Them Eat Vegan. That book is on my short list of go-to books. So, I’ll have to look up the no-fu loaf. Also, thanks for the stuffing burger link. Looks really, really good.

            So many recipes to try! So few meals in a lifetime!

      • Thea

        Sunshine99: I made that lentil loaf for Thanksgiving and it went over really great. I made it in a bundt pan which gave it a great shape. And then I used a cranberry-balsalmic glaze to put in the center and dribble on top that I got from a different site.

        Filipe: I also suggest recipes from the following book if you can get your hands on a copy:

        I haven’t made recipes from the Christmas chapter, but I’ve made several other recipes in the book and they almost always come out perfect – with great taste, texture and presentation. I make those recipes outside of holidays too, I like them so much. The main drawback to this book is that those recipes are bit more involved than some people may want to do. But I think : hey, this is for special holiday cooking. So, a few more ingredients and effort are called for to make it special. (That’s just my approach. Of course, holiday cooking does not have to involve more effort.)

        Good luck. I hope your event goes off great!

        • b00mer

          Thea, love the bundt pan idea for the loaf! While I don’t have a regular sized one, you’ve reminded me that I happen to have a mini bundt pan that makes little cupcake sized bundt shapes (have never used it, lol!), which I think could make some pretty adorable little loaves. Might have to try that. Also the cranberry balsamic glaze idea. Have bookmarked a recipe for one to try out next week.

          Also thank you for sharing that cookbook link. From the few recipes I could view, the Garlicky Chestnut Butter is definitely calling my name! I made regular cranberry sauce for thanksgiving, and the Cranberry Pear Compote sounds like a nice change of pace to try for Christmas. Whether I pick up the book or not I think I’ll try those out next week as well.

          • Thea

            b00mer: I can’t take credit for the bundt pan idea. Chef AJ suggested it in her Unprocessed cookbook. I have a big silicon one with ridges, and it really did work great and look fancy. I think mini-ones would be very cute, though. No reason not to give that a try.

            I really like this thread/exchanging ideas for holiday cooking. It sure can help when you want to try to impress more “traditional” (?less sophisticated) pallets.

            The book is a real winner. I have *lots* of cookbooks, but only a few that I would really praise highly. If you end up making some recipes from that book, I would be interested in knowing how it goes. There is a recipe in the book for a savory yule lot made of chickpeas if I remember correctly. But there is no picture. I’m really interested to hear from someone who makes it.

    • Marice

      Moosewood vegetable tofu lasagna. Get the new Moosewood cookbook at the library. Takes about an hour to make even non vegans like it. DELICIOUS!

    • tbatts666

      Google Vegan Black Metal Chef

      • largelytrue

        That’s not whole food vegan.

        • tbatts666

          Yeah, I agree his stuff isn’t all healthy. I don’t cook it that often.

          But if you know someone who has a palate accustomed to salt, sugar and fat his stuff usually works.

          most of my non-whole food friends tend to think the stuff I regularly eat is bland… I think there is room for compromise when cooking for other people. I consider it gateway food to a better diet.

    • Leah

      Lots of yummy vegan recipes here, including a winner soy whipped cream (really delicious!)

      • Wilma Laura Wiggins

        That site has really UNHEALTHY, fat filled recipes. The soy whipped cream uses 2 cups full of oil. Just because something is vegan, doesn’t mean it is healthy.

  • Plantstrongdoc M.D.

    De-alcoholized wine sounds terrible!

    • Tobias Brown

      Isn’t this what you’d have when using it in cooking? I’m pretty sure the alcohol evaporates upon serious heating.

      • Julot Julott

        Not even at high temperature, it seems it does evaporate around 80°C~

        • b00mer

          Surface temps achieved with a pan on the stovetop are much greater than 80 C.

          • Julot Julott

            no doubt

  • Tobias Brown

    This is very confusing. One study shows we should filter coffee to remove the negative effects on cholesterol levels. (Should this matter if cholesterol is below 150?) The next study shows a negative effect of coffee on endothelial dialation. The next study contradicts that one by suggesting that drinking some of the grinds (which is what we’ve filtered out in the first study right?) offers benefits to endothelial functioning. So, those studies contradict each other, no? The next study suggests caffeine helps heart function. (The coffee in that test evidently didn’t have the non-caffeine elements of whole coffee right?) A final study on coffee suggests it impedes blood flow to the heart. So, I guess given the contradictory information, it’s best to drink tea.

    Would using some soy milk in coffee be considered a creamer?

    • Waterdrinker

      Just drink water. Simplify your life.

      • Dave

        Tea is in the clear, too!

    • HemoDynamic, M.D.

      This is a link –> A cup of Joe has many benefits

      • Plantstrongdoc M.D.

        I`m in!

    • Gerald

      Thanks for this summary, Tobias, to which I’d add research on longevity. As the Mayo Clinic, e.g., summarizes the research: “most studies find an association between coffee consumption and
      decreased overall mortality and possibly cardiovascular mortality,” which raises questions about the meaningful effects of coffee on endothelial function found in the research cited in this video. Dr. Gregor?

  • Space

    Having no idea what “Greek coffee” was, I did a little research and found out that it is actually Turkish coffee, artificially renamed for political reasons.
    ( Just like “freedom fries” are actually French fries )

  • apprin

    Great video. The mention of aluminum below does intrigue me, especially the discussion of intestinal wall permeability. As a raw foods vegan, I have given thought to intestinal wall health; i.e., is the intestinal tissue enhanced, as I would imagine, or, might it be weakened by particular vegan diets that include raw foods. The matter of tea consumption is timely for me, in that I have elected to eliminate fermented tea from my diet, opting for only green.

  • Am I the only one who would be very grateful for a video on the latest news about what we can add soy milk to without any or much suppression of beneficial nutrients? Fruit and veggie smoothies, coffee, tea?

    • Joe

      I have the same question. I put a splash of soy milk in my tea, and add almond or soy milk in my smoothies. It would be great to know if that is good, bad, or indifferent.

    • Russell

      Yes, I’ve been wondering the same thing. Why does Dr. Greger feel that soy in his smoothie is appropriate? Doesn’t that negate the anti-oxidant benefits of all the berries? I still put soy in my tea and coffee, but sometimes, I reach for the hemp milk instead, despite the less pleasant taste. Not sure that’s a benefit, but maybe…. A video on all this would be great!

    • Arjan den Hollander.

      Abover 14% daily energy from proteins you get a massive rise in cancer vulnerability (china study), with 10 % a good bit safer then 14%.
      14 to 20% representing a doubling or even tripling of growth rate, the graph really shoots up after 14%.
      S0 extra soy protein is probably safe if your daily total is around 10 % of your caloric intake, and reasonably safe at 10 – 14%.

      • Hi Arjan! Thank you. Since the China study treated casein, the safe percentage of protein pertained to animal protein, no?

  • Matthew Smith

    A single cup of coffee can raise your blood pressure by twenty points, before blood pressure screenings. It can increase your heart rate. Drinking coffee in such a way, long term, might raise blood pressure chronically and even damage the vascular system. Switching to Hibiscus tea could lower blood pressure. Blood pressure is the force with which your heart pumps blood, the harder the worse long term. Expresso has almost as much antioxidants as matcha tea. Coffee has anti prostate cancer benefits. However, for immediate help with heart disease, going of coffee could improve your heart rate. So could going on a berry, greens, and beans diet.

    • James Wald

      The best thing we can do is eat, and drink, a diverse set of plants! Videos like this one are perfect for helping us tune the intake specific plants over time to maximize the potential health benefits. It’s the best game I’ve ever played!

  • Marina Kurban

    How about almond milk in smoothie vs soy milk? I have been adding soy milk however, it seams like it is not the best idea.

  • Arjan den Hollander.

    That is really strange, I like my tea very much but I’ve observed a very strong relation between my tinnitus and tea.
    Stress worsens it A LOT, and to much coffee and tea both literally amplify it too.
    So from the point of endothelial dysfunction this doesn’t add up, is there anyone here who can fill me in on the missing piece and or pathway,
    these stimulants can be responsible?

    • fred

      I’ve had tinnitus for over 40 years…there are some supplements that claim to help it….those that improve micro-circulation. Main thing is to not fight it…learn to live with it until if and when you find a solution. Mine comes and goes in intensity…stress is probably one factor for sure.

      One thing that might help is l-theanine…the amino acid found in tea…the sun theanine brand is best…one cap might relax you for 12 hrs or so. I can’t take one every day…makes me too relaxed over time…does give a “sunny disposition” though.

    • jj

      My tinnitus is at least partly related to migraine. It comes and goes or it’s louder and softer. I have learned to ignore it.

    • lemonhead

      Might have something to do with GABA-mediated inhibition:

  • James Wald

    This isn’t the nail in the coffin, but the strength of the evidence supporting coffee’s health benefits has been slowly losing ground over the years. Based on the latest evidence that we have, I’m going to take action and swap one or two of my morning coffees (currently 3 – 4 per week) with tea, which I already drink habitually. Hibiscus, green, black, and chai. I’ll keep drinking a few cups of coffee per week as a treat, and keep an eye on the developing evidence.

  • Youcef

    In the assessment of coffee’s benefits, it is important to remember the basics : coffee is an organic food that has been roasted* and therefore also smoked.
    High-heat on anything organic is known to create clinically relevant amount of tars, polycyclic hydrocarbons, aldehydes…which is exactly why BBQing is unhealthy. Important occupational risks for coffee roasters that directly involve the gaseous by-products of this “charring” process.
    Without even the need to dive into pointy studies, there are predictably going to be pros and cons on anything high in anti-oxidants yet that has been roasted (and therefore smoked) on high-heat, something which tea doesn’t suffer from. Coffee, as much as we love it, is no different from roasted-smoked broccoli or kale :)

  • Really

    Correct me if I am wrong, I assume the coffee drinkers did not drink their coffee black? I assume they drank it with sugar, yet they did not measure the amount of sugar. Could it be the sugar and not the coffee itself that spiked the rise in TG?

  • Sandy

    IS ALMOND MILK A CREAMER? I ran through the comments quickly and didn’t see this answered: Is almond (or other non-dairy milk replacement product) considered a creamer? I am a very healthy 59 year old WFPB commercial pilot but have had creeping up BP that is intermittent. I DID drink a lot of black coffee too (2-5 cups a day). Undoubtedly some stress issues can affect BP I understand. But I switched to tea a few months back (trying to stay away from any medical prescription intervention) and have noticed my blood pressure creeping back down to the normal range mostly with no other lifestyle changes. But I do add almond milk because in the early morning after I wake up, the tannins in straight tea make me nauseas and the almond milk seems to keep that from happening.

  • rjhorn

    Very interesting. I’m a vegan, and I stopped drinking black tea years ago because I read that unless you add cow’s milk to black tea, the tea leaches iron from your system. True? Not?

  • Kitsy Hahn

    What a difference a year makes! According to other recent “studies,” caffeinated coffee is great for our arteries.

  • Ryan Alton

    I wonder if cold brew caffeinated coffee would have the same effect. Maybe it’s the heating process that we use to brew the coffee; or it could even be the roasting of the beans and decaffeination clears away whatever we’ve done to the bean during that process. Interesting…

  • Kitsy Hahn

    “But about 10 years ago a study was published on the effects of coffee on endothelial function, and the function of our arteries.”

    Dr. G, have there been any recent studies regarding this? We know how “things change” from day to day, especially in the nutritional advice department. :-) I myself drink 2-3 cups of black coffee a day, part of which is decaf. The famous psychic Edgar Cayce said that coffee is a “food,” but only if it’s taken by itself, with nothing added to it. There’s something in cow’s milk, especially, that goofs up the digestion.

  • Tobias Brown

    Would appreciate a report on the many coffee alternatives based on chicory, rye, barley, etc. There are tons of these and it appears that they are more popular in Europe, especially France.

    • Darryl

      Chicory is a traditional coffee “extender” in New Orleans (about a third of blends with coffee). Given chicory root is ~40% inulin and ~20% oligofructose, and these prebiotics are commercially extracted with hot water, I’d love to see if chicory brew might offer similar benefits for healthy gut microbiota as the extracts: 1, 2, 3, 4, 5.

      • Tobias Brown

        I’ve purchased 15+ different types of these products for tasting purposes. They often also use rye or barley. Some say malted. Some are instant, others require brewing. The powders, though often having a bitter taste, is very pleasing to consume, I mean just dipping your tongue in the powder. I find it hard to stop eating it. One brand, which appears to be the biggest producer in France, is must more sweet though they add no sugars.

    • lemonhead

      Some coffee substitutes have very high acrylamide levels:
      see under ‘hot beverages’:

  • Max 22

    I gave up coffee a year ago and never missed it since. Was actually very easy. Benefits? Less stinky armpit sweat, no headaches anymore, whiter teeth, less expenses. All upsides, no downsides.

  • Ilana

    Any actual info on fluoride toothpaste and in water?

  • Diane

    I realize this was not tested but I wonder if drinking black tea with almond milk would avoid the “undermining” aspect they found when dairy milk was added? I need almond milk in my tea and coffee….

  • jon

    Getting too complex. I’ll stick with water.

  • Betty

    I am a black decaf coffee drinker with heart disease. Too bad I can’t stand the taste of tea. Maybe another thing I must force myself to acquire a taste for? Ugh.

    • William Dwyer

      You can buy decaffeinated green tea extract, which has all the epicatechins (EGCG) of green tea, which are great for endothelial function. That’s what I do, because I don’t like tea (or coffee)!

      • Betty

        Thanks for the info!

  • Sophie

    Here’s my big question for the Doctor. Everyone is going on about Dave Aspray’s Bulletproof coffee, and how they are losing weight and feeling energized etc. The thing that gives me pause is the whole idea of adding butter (albeit grass-fed) etc to his supposedly mold-free coffee. I would love to get everyone’s feedback, especially Dr. Gregor on this huge trend.

    • Toxins

      The bullet proof diet is another play on the paleo diet and has no scientific bearings. Kale, chickpeas and quinoa are considered “suspect” foods, according to the author of this dietary plan. I would not pay attention to this fad diet.

  • Cory

    Really, after hearing all that I’ll just stick to clean pure water. No B.S. thanks

  • Sorry, some of these studies simply sound ridiculous. I drink coffee when I want to and I think I will be fine. I am healthy at 67 and plan to live a little longer but really who the hell wants to live forever?

  • Dominic Bolaa
  • Linda Kennedy

    Dr.Greger, where is the video where you said we may be attracted to coffee for good reason? I’ve been searching, and it’s driving me nuts not finding it. Someone please reply.

  • William Dwyer

    What about the caffeine in dark chocolate, which is supposed to be so healthy?

  • S Slavin

    A study from the AHA ( ) seems to have measured pure caffeine against BP measurements taken an hour after ~250mg of caffeine (which is something like a 16oz dark coffee).

    Results seem to indicate that BP is indeed raised within an hour in response to 250mg of caffeine. If caffeine alone is supposed to RELAX blood vessels, how is it raising blood pressure?

    I know this is an older article but would appreciate it if some light can be shed. While it may be easy to say “just skip coffee”, other contested healthy foods like dark chocolate and teas have caffeine as well (albeit not in 250mg doses)

  • Cristian


    Can you tell me please if there are any health concerns regarding coffee capsules, like the ones from Nespresso? And witch method of making coffee is more safe?

    Thank you!

  • precie

    Black tea has more caffeine than green tea so I’m wondering if green tea has the same effect as black tea for increasing blood flow. I drink tons of green tea.

  • Ben Dahlstrom

    Please consider Dandyblend for a sustainable coffee substitute #cutbackoncoffee

  • Ron

    I just finished reading “How not to die”. wonderful book. Near the end he discusses the beverages, water #1, tea and coffee #2, etc. The impact on the adrenal glands from coffee/caffeine was not discussed. I’m also not able to find a video on the site that covers this area. My understanding is that when you drink coffee, shortly after the vast majority of your adrenaline is release into your system. In my case, I experienced this daily when I drank coffee, I would be sipping my morning cup while at my desk job and about 2 hours later I was buzzing in my chair to the point I couldn’t sit still and had to get up and go for a bike ride or run to get rid of the jitters. Only to find that about 30 minutes into my exercise I appear to hit a wall. Now that i’m off coffee, I still get a internal signal around 11am to go exercise but its a much more gradual build up and while exercising when I get to the 30 minute mark it seems my body is more easily able to continue and pull energy from its stores. I’m was hoping someone on the staff could take this as a general question “Has the team come across any studies related to coffee and the adrenal gland”?