Blood Type and Diet

Image Credit: Andrew Mason / Flickr

Is the Eat Right For Your Type (blood type) diet fact or fiction?

Some people I know tell me that because they are not a Blood Type A, they need to eat meat or dairy or whatever; and I know people who claim that they were vegan for blah blah years and they almost died, and felt so much better after they started eating the meat or dairy or whatever again. I don’t know what to say to them.

Veguyan / Originally posted on Dietary guidelines: pushback from the sugar, salt, and meat industries


I was just actually interviewed about D’Adamo’s Blood Type Diet astrology in the Chicago Tribune. Probably best summed up by a quote from a review published in the Journal of the Norwegian Medical Association:

“The theories of D’Adamo must be viewed as lacking a scientific basis and should not be taken seriously….[H]ad D’Adamo been practicing in Norway, his practice would have been a violation of the so-called quack law….[I]t is difficult not to see the whole thing as a crass fraud.”

Image Credit: Andrew Mason / Flickr


Michael Greger M.D., FACLM

Michael Greger, M.D. FACLM, is a physician, New York Times bestselling author, and internationally recognized professional speaker on a number of important public health issues. Dr. Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before Congress, appeared on The Dr. Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial.

5 responses to “Is the Eat Right For Your Type (blood type) diet fact or fiction?

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  1. All I know is that I lost 30 pounds by following it. I gave up chicken for turkey and more lamb and fish. I don’t eat corn and especially anything with high fructose corn syrup. I also don’t eat pork or peanuts. I used to have terrible problems with rectal itching that would sometimes drive me crazy and I’ve not had that since I started on the blood type diet. What I have found most amazing is how many people don’t know their blood type and it’s very difficult to get that information (which everyone should know) from a doctor. That’s one reason why I am so convinced that there’s something to this – the fact that the medical community makes it so difficult for the average person to find out what their blood type is. Think about how many industries would go under if disease could be greatly reduced by eating the foods that are perfect for your blood type. No more weight loss industry, no more exercise industry, no more Big Pharma providing pills after pills after pills.

    1. Have you thought about the possibility that you remedied your issues, and felt much better, not due to the blood type diet itself, but due to the fact you were eating healthier food in general? I have known a few people who went on the blood type diet, and did feel better! My aunt did this actually. Her diet before was terrible, lots of white bread products, processed food, and a random snack food diet. She went on the blood type diet, and stopped eating processed grains, and cut way down on junk food. She felt much better! So, is it because the blood type diet is true, or is it because she stopped eating terrible food in general? I am glad my aunt found inspiration for changing her lifestyle, but putting all your faith in a diet that can’t be proved by scientific fact could be dangerous in the future, or over a whole lifetime. I hope you stick around this site, because there are a ton of scientifically verified facts here.

  2. Could you tell me who wrote the above answer to the question about blood types? Does Dr. Greger stand behind that answer? Could you say more?

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