"No matter what advocates of animal-based diets might say about the merits of being in the 'zone' or 'eating right for your blood type', from an ecological standpoint, a meat-based diet for the world's population is non-achievable and, for even a sizeable minority, is non-sustainable."

"In my opinion, D'Adamo has spun an evolutionary fairy tale that leaves many unanswered questions."

"To put things into perspective, your blood type shouldn't dictate your eating patterns any more than the interior of your car should determine which gasoline you put in it. Fad diets won't solve your nutritional problems; healthy eating will."