According to the book "Eat Right 4 Your Type" by Dr. Peter J. D'Adamo, people with different blood types process foods differently. For instance, Dr. D'Adamo found that people with high blood sugar, high blood pressure, or people with high stomach acid share the same blood groups. He also found that blood types O and B have greater susceptibility to infectious diseases like cholera, scarlet fever, and typhoid. "Eat Right 4 Your Type" emphasizes dietary lifestyles Dr. D'Adamo matched to blood groups, on the theory that certain blood types lack the enzymes to process certain types of foods. The A positive (agrarian) blood type group flourishes on primarily a vegetarian diet consisting of protein, soy, vegetables and grains, according to this theory, which is not widely held by the mainstream medical community. As with starting any diet, consult your doctor first.
Get at least one book in the Eat Right For Your Type series and read it thoroughly. Familiarize yourself with the plan and buy the groceries you'll need for the next several days of meals and menus you'll be preparing based on the information in the book.
Learn the types of protein foods you will be eating for type A blood. These include chicken, turkey and Cornish game hens. Seafood choices include carp, cod, grouper, mackerel, monkfish, pickerel, red snapper, rainbow trout, salmon, sardine, sea trout, silver perch, snail, whitefish and yellow perch.
Learn the protein foods type A blood types should avoid. These include beef, pork, lamb, veal, venison, duck and goose. Seafood to avoid includes anchovies, barracuda, beluga, bluefish, bluegill bass, catfish, caviar, clam, conch, crab, crayfish, eel, flounder, frog, gray sole, haddock, hake, halibut, herring, lobster, lox, mussels, octopus, oysters, scallop, shad, shrimp, squid, striped bass and turtle.
Avoid most dairy. According to Dr. D'Adamo, most dairy products are not digestible for type A blood types. Yogurt, mozzarella, feta, goat cheese, goat milk, kefir, and ricotta are dairy products that can be eaten if you are a type A blood type.
Learn the nuts and seeds to eat and to avoid. Peanuts and pumpkin seeds are the most beneficial nuts for A blood types, whereas brazil nuts, cashews, and pistachios should not be eaten.
Learn which beans are included. Black beans, pinto, lentils and black-eyed peas are excellent for people in the type A blood group, according to the theory. The only beans not allowed are garbanzo, kidney, lima, navy and red beans.
Learn which grains to eat and which to avoid. Amaranth and buckwheat grains are good for type A blood types and breads containing soya flour, rice and rye flours can be eaten. English muffins, high-protein breads, whole-wheat, multi-grain, and white flour breads should not be eaten by type A blood types.
Learn what the theory has to say about vegetables and fruits for type A blood types. Garlic, onions, broccoli, carrots, collard greens, kale, pumpkin and spinach are immune system enhancers for type A blood types, according to the theory, and should be eaten in larger quantities. All other vegetables are allowed except for the following as they are bad for the digestive systems for type A blood types: Peppers, olives, Potatoes, sweet potatoes, yams, cabbage, tomatoes, Lima beans, eggplant, and mushrooms. All fruits can be eaten by type A blood types except for melons, cantaloupe, honeydew, mangos, papaya, bananas, coconuts, orange, rhubarb, and tangerines.
Plan meals and menus that incorporate the foods that are beneficial to type A blood types, and that exclude the foods that are detrimental according to the theory.