Blood Type Diet Overview
The Blood Type Diet proposes that an individual's blood type affects how efficiently food is processed once it enters the body. While some people are apparently natural born carnivores, others should stick to greens and grains.
According to the diet, the types of foods you eat—whether flora or fauna—are digested differently depending on whether you are type A, B, AB or O.
Since its debut, the Blood Type Diet has evolved. Today, followers can categorize themselves as hunters, gatherers, teachers, explorers, warriors, or nomads according to physical traits, like build, fingerprints, the shape of the molars and other attributes.
When invented: Founder Dr. Peter D'Adamo released his first book detailing the Blood Type Diet, Eat Right 4 Your Type, in 1997. It became an instant best-seller.
Who invented it: The Blood Type Diet was created by Dr. Peter D'Adamo, a naturopathic physician studying the body's ability to self-heal. D'Adamo used his findings to formulate this dietary theory.
Length of diet plan: The Blood Type Diet is meant to be a lifetime commitment.
When singer Cheryl Cole decided to go on the diet, she insisted that she merely wanted to increase her energy levels—not lose weight.