Now what?Īdvocates of blood type diets may say that while the ideal study has not yet been performed, the absence of evidence doesn’t prove they’re ineffective. And if you have certain health conditions, such as high cholesterol or diabetes, a nutritionist can make better evidence-based recommendations for you than those determined by your blood type. Recommended supplements are not cheap neither are the recommended organic foods. Personal preferences might be a problem: a vegetarian with type O blood may struggle to stay on the assigned diet, and people who love red meat may be disappointed to learn they have type A blood. Eating based on your blood type requires you to know your blood type and then follow a restrictive diet. It’s a fair question, especially since some improvements were seen in people who adopted certain blood type diets (see link above). So, in addition to a lack of evidence that the diet works, serious questions remain about why it should work in the first place. In addition, there is no proven connection between blood type and digestion. For example, there is evidence that type A was actually the first blood group to evolve in humans, not type O. And since Group AB blood was supposed to have evolved from the intermingling of people with types A and B blood, type AB recommendations were intermediate between those for people with types A and B blood.Įach of these theories has been challenged. Group B blood types were said to arise among nomadic tribes who consumed a lot of dairy products. Group A was said to evolve when humans began to farm and had more vegetarian diets.
Type O was said to be the original "ancestral" blood type of the earliest humans who were hunter-gatherers, with diets that were high in animal protein. The theory behind this diet is that blood type is closely tied to our ability to digest certain types of foods, so that the proper diet will improve digestion, help maintain ideal body weight, increase energy levels, and prevent disease, including cancer and cardiovascular disease. Similarly, a 2021 study of a people on a low-fat vegan diet found no connection between blood type and lipid levels or other metabolic measures. The 2014 study found that while people following any of the blood type diets had some improvement in certain cardiometabolic risk factors (such as cholesterol or blood pressure), those improvements were unrelated to blood type. The 2013 study analyzed the world’s medical literature and found no studies demonstrating benefit from a blood type diet. Studies published in 20 about the blood type diets are worth noting. Even now, a search in the medical literature for the author’s name reveals no research pertaining to this diet. High-quality studies about the blood type diet had not been published in peer-reviewed medical literature. But does eating for your blood type work? For example, people with type O blood are advised to choose high-intensity aerobic exercise and take supplements for their sensitive stomachs, while those with type A blood should choose low-intensity activities and include meditation as part of their routine. For weight loss, tofu, seafood, green vegetables, and kelp are best but chicken, corn, buckwheat, and kidney beans should be avoided.Īs mentioned, the recommendations for the blood type diets extend well beyond food choices. Those with type AB blood should eat dairy, tofu, lamb, fish, grains, fruit, and vegetables.To lose weight, type B individuals should choose green vegetables, eggs, liver, and licorice tea but avoid chicken, corn, peanuts, and wheat. Those with type B blood should pick a diverse diet including meat, fruit, dairy, seafood, and grains.For weight loss, seafood, vegetables, pineapple, olive oil, and soy are best dairy, wheat, corn, and kidney beans should be avoided. Those with type A blood should choose fruit, vegetables, tofu, seafood, turkey, and whole grains but avoid meat.To lose weight, seafood, kelp, red meat, broccoli, spinach, and olive oil are best wheat, corn, and dairy are to be avoided. Those with type O blood should choose high-protein foods and eat lots of meat, vegetables, fish, and fruit but limit grains, beans, and legumes.Here are some of the recommendations according to the "Eat Right for Your Type" diet: Soon, the book was a best seller and people everywhere were finding out their blood type, revising their grocery lists, and changing how they ate, exercised, and thought about their health. One’s choice of condiments, spices, and even exercise should depend on one’s blood type.
In 1996 Peter D’Adamo, a naturopathic physician, published a book in which he described how people could be healthier, live longer, and achieve their ideal weight by eating according to their blood type. Have you heard of the blood type diet? I thought it had been debunked long ago but patients keep asking about it, so I figured I should learn more.
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