The Blood Type Diet is based on the book “Eat Right 4 Your Type” and the more recent book “Live Right 4 Your Type” by Dr. Peter D’Adamo. The basic idea of the book is that your type determines how different foods react in your system; and how you can benefit from eating the correct foods and optimizing your health and wellness. The same foods can be highly beneficial to one type, while being highly detrimental to another blood type. Dr. D’Adamo recommends that people with type O blood eat a fairly high protein diet including lean beef.
Type Os thrive on intense physical exercise and animal protein. Unlike the other blood types, Type O’s muscle tissues tend to be slightly on the acidic side. They can efficiently digest and metabolize meat products because they tend to have high stomach acid content in comparison to other type. The success of the Type O’s diet depends on the use of lean, chemical-free meats, poultry, and fish. Type Os don’t find dairy products and grains quite as consumer friendly as most of the other blood types do; and should avoid them in general.
According to Dr. Peter D’Adamo, Type Os should severely restrict the use of dairy products in their diet. Their system is not designed for the proper metabolism. If you are a Type O of African ancestry, you should eliminate dairy foods and eggs altogether. Type O’s should eat limited dairy products. Type O’s who are African American should not eat any milk or egg products at all. Other type O’s should eat only organic, free-range eggs. Goat milk and feta cheese are good choices for them, and mozzarella is allowed occasionally. All other dairy products should be avoided most of the time. Clarified butter is an allowed choice for cooking.
So according to Dr. Peter D’Adamo, it is one of the major characteristics of people with type O blood that they thrive on intense exercise and have trouble digesting dairy products. Different foods introduce substances into the body called lectins. Depending on your specific type, certain lectins are welcomed by your immune system, while others aggravate it. The theory here is if you only eat foods that contain compatible lectins, then your body can remain balanced and at a healthy weight. This is why you should follow the blood type diet; and consume only the foods that are beneficial for your type.