Three Diets for Three Blood Types

Hmm, okay, so apparently, there is a specialized diet out there that conducts how you eat based on your blood type (A, B, O, and AB). According to Wikipedia, the diet was developed by a physician named Peter D'Adamo who claims that the one of the most important aspects in effective weight loss is eating certain foods according to what blood type you have. In his book, he also discusses the evolutionary tree of blood types, how they have developed over the years, and what types of people were likely to have certain blood types.