Blood Type and Diet

Blood Type and Diet | The Paleo Diet

Dr. Cordain, I pulled my information from and attributed the statement, “Paleo is truly is the world’s healthiest diet,” to you, which I doubt is a stretch.

Have you gotten into any of the information about blood type and diet related nutrition info? I’ve only heard snippets, but I’m curious what an expert thinks of it.


Dr. Cordain’s Response:

Hi Seth,

Thanks for your support. I have completed my critique of the Blood Type Diet, which I have been researching and reading about for the past couple of weeks, which you can find here for more in-depth reading. Although I don’t want to give away the story line, I can say that the concept of four specific types of diet for the four ABO blood groups (A, B, O & AB) is not supported by the available data. However, having said that, susceptibility to disease, and the robustness of the immune response to pathogens throughout the entire GI tract, is very much related to ABO blood groups. Our group has published at least one paper on the dietary lectin/disease concept and we believe that common dietary lectins may promote certain diseases (allergies, autoimmune disease) while simultaneously promoting chronic low level inflammation. However, little evidence in either humans, animals or tissues point in the direction that dietary lectins elicit disease symptoms exclusively via interaction with ABO antigens. Additionally, of the hundreds of plant lectins that have been identified, only a very select few have been demonstrated to bind gut tissue. Hence, most dietary lectins are benign, simply because they cannot penetrate the gut barrier.

Loren Cordain, Ph.D., Professor Emeritus

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About the Author:

Loren Cordain, PhD, Professor Emeritus Dr. Loren Cordain is Professor Emeritus of the Department of Health and Exercise Science at Colorado State University in Fort Collins, Colorado. His research emphasis over the past 20 years has focused upon the evolutionary and anthropological basis for diet, health and well being in modern humans. Dr. Cordain’s scientific publications have examined the nutritional characteristics of worldwide hunter-gatherer diets as well as the nutrient composition of wild plant and animal foods consumed by foraging humans. He is the world’s leading expert on Paleolithic diets and has lectured extensively on the Paleolithic nutrition worldwide. Dr. Cordain is the author of six popular bestselling books including The Real Paleo Diet Cookbook, The Paleo Diet, The Paleo Answer, and The Paleo Diet Cookbook, summarizing his research findings.

1 Comment on "Blood Type and Diet"

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  1. Jaimee says:


    Regarding the blood type and Paleo, I am type A, which, according to the Blood type diet, we are not supposed to eat red meat, and only limited fish and poultry. The book states that A blood types cannot metabolize meat, which turns to fat in our bodies. Is this true?

    Thank you

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