Blood Type O Diet Foods

The concept of a diet based on blood type originated with Dr. Peter D'Adamo and his book "Eat Right 4 Your Type." Though D'Adamo has been criticized for failing to conduct adequate trials to support his claims, there is considerable agreement with his basic premise that blood type can affect reactions to certain types of food. The Type O diet is centered on high protein foods.

Type O Profile

According to D'Adamo, Type O is the oldest blood type. It reflects the hunter/gatherer epoch of civilization before the advent of agriculture. During this period, humanity survived on what it could easily harvest. Groups were nomadic, moving to where wild game and fresh fruits and vegetables could be hunted and harvested. Because Type O evolved before agriculture produced abundant grains, A'damo claims it cannot tolerate or digest them properly.

Protein

Type O thrives on a high protein diet, D'Adamo believes. Primarily, this means meat, such as beef, chicken, veal, lamb and venison. It also includes most fish and seafood, especially cod, mackerel and herring, but not catfish, salmon, caviar or octopus. Because Type O is subject to irregular thyroid activity, the iodine in saltwater fish is believed to be beneficial. Pork and dairy products, including eggs and cheese, are protein sources that entered the diet during the agricultural period and are not recommended for Type O.

Fruits and Vegetables

D'Adamo claims Type O lacks several blood clotting factors, and that foods rich in vitamin K are essential. These include leafy greens including kale, collard greens, romaine lettuce, spinach and cruciferous vegetables such as broccoli. Other beneficial vegetables include onions, parsley, parsnips, red peppers, sweet potatoes, pumpkin, seaweed, turnips and garlic. The vast majority of fruits are neutral, with melon, oranges and strawberries being fruits to avoid. Only plums and figs are particularly beneficial for Type O.

Grains, Nuts and Legumes

Type O should avoid grain products, D'Adamo says. If necessary, sprouted Essene or Ezekial bread is acceptable. Most nuts and seeds are permitted, especially pumpkin seeds and walnuts, but these should not be used to substitute for meat as a protein source. Azuki beans, pinto beans and black-eyed peas are beneficial, but kidney beans, navy beans and lentils should be avoided.