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Find out how to keep healthy by getting the facts on proper nutrition: what to eat and what not to eat. Learn what your body needs, if dieting works, balanced food portions, and much more.
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How beneficial is the Eat Right 4 Your Type diet?
's Response

Although Dr. D'Adamo's book is a bestseller and his diet plan has attracted a high number of followers since its 1997 debut, there is no credible scientific data to support his claim that a person should base their diet plan on their blood type. At present, no clinical trial can verify that ABO blood typing is the most important factor in determining a healthy diet.

D'Adamo, a naturopath himself, bases his diet program on the idea that a type of food proteins called lectins will react differently with each ABO blood type. According to D'Adamo, if you are type O you are believed to be a "hunter" and should enjoy a diet rich in meat. Those who are type A are believed to be "cultivators" and should stick with a mostly vegetarian diet. Those that are type B are believed to be "nomads" and can tolerate dairy. And those that are type AB are the "enigma" and should embrace a diet that blends together foods found in the recommended diets for types A and B.

D'Adamo roots this separation of food groups on the evolution of blood type (where O is considered the oldest and AB the newest) and the historical food acquisition behaviours associated with each type's origin. This method of classification also lacks credible research and evidence. Further, the labelling of foods being either "beneficials," "neutrals," or "avoids" appears to be based entirely on his general theory and not documented research.

As no studies have been conducted on those who faithfully follow the Eat Right 4 Your Type diet, it remains unclear what long-term effects (either positive or negative) this type of diet has on weight management and overall health.

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