Peter J. D’Adamo, a licensed naturopath, claims that an individual’s blood type should determine what foods to eat and which ones to avoid. He asserts that when a particular blood type consumes "off-limit" foods, the effect is akin to a transfusion of mismatched blood. His theory attempts to tie the evolution of man to changing blood types and diets. Recommended caloric intake varies widely from day to day.

Advantages:
The plan emphasizes lean sources of protein in addition to recommending several servings of fruits and vegetables for all diets.

Disadvantages:
Current scientific research does not support D’Adamo’s claim that blood type determines an individual’s response to certain foods. Further, most critics of the plan cite the lack of a relationship between blood type and disease as well as the false assumptions made about the diet of early man.

Long-term Success:
Recommended menus include unusual and hard-to-find foods, and meal preparation for families with varied blood types could prove challenging over the long term.

Eat Right For Your Type was created by Peter J. D’Adamo, N.D.