If you read the introduction to the book the author provides no references or sources for his theories. The only good is it gets some people to eat foods they normally would not eat. It tells people not to eat some foods for no good reason. Another fad book firmly in the pocket of the meat industry. How does a doctor appear out of nowhere, write a book and have tons of money for advertising to promote it? Books by doctors that are real don’t go to the top of the best seller list overnight.
According to the American Journal Of Nutrition, “No evidence currently exists to validate the purported health benefits of blood type diets. To validate these claims, studies are required that compare the health outcomes between participants adhering to a particular blood type diet (experimental group) and participants continuing a standard diet (control group) within a particular blood type population.”
No such scientific research or evidence exists.