Blood Type Diets have basically different food requirements. For Blood Type A, they need more fruits and vegetables and no meat. For Blood Type B, they need more green vegetables, some meat, eggs and dairy that are low in fat. For those with Blood Type AB, they need seafood, green vegetables, tofu and dairy and avoid caffeine and alcohol. Lastly, Blood Type O, require an increase in protein like fish, lean meat, vegetables and less dairy, grains or beans. Check out our site for more information. http://www.naturaltherapies.com/allergies-2/