The role of blood type in health, living longer and achieving ideal weight has been discussed at length by Dr. Peter D’Adamo, the creator of the blood type diet. He argues that your blood type impacts numerous bodily processes. Your blood type controls your immune system and your digestive system.
Blood Type O
Globally, the Typo O blood type is the most common. It is also the earliest known blood type dating back historically to when meat was the main source of food. People with Type O blood have strong digestive and immune systems. If you have Type O blood, your stomach has a high level of acid. This is important for digestion and drawing as many nutrients as possible from your meals.
Type Os benefit from high-protein diets that include red meat, fish, and chicken. Dairy products are harder to digest and are to be avoided. Beans should be limited because they make muscle tissue less acidic and Type Os feel healthier when the muscle tissues are higher in acid.
Blood Type A
The immune system of Type A is able to fight off infections and bacteria. This blood type does well on fish and proteins from plants and grains. If you have Type A blood, you benefit from a vegetarian diet that includes soy products, fruits and vegetables, grains, beans and legumes and some fish.
Individuals with Type A blood should avoid specific fish, such as flounder, sole, and halibut, because of their lectin, which irritates the digestive system. It is also important for people with this blood type to avoid dairy products because their immune systems react to dairy products with sinus conditions or asthma.
Blood Type B
Blood Type B has a combination of the characteristics of Type O and A. It is a more tolerant blood type than the other two. The best diet for this group consists of meats such as rabbit, venison, mutton and lamb. Many types of fish are healthy for this group. Chicken should be avoided because it can lead to autoimmune disorders in this blood type.
Type Bs benefit from dairy products, but should avoid eating sharp cheeses because they find them hard to digest. This blood type should avoid nuts and seeds such as peanuts, sunflower and sesame seeds, for example, because they contain lectins that get in the way of proper insulin production.
Blood Type AB
Blood Type AB is the rarest blood type. This blood type combines some of the strengths and weaknesses of Types A and B. Blood Type AB benefits from a diet that is largely vegetarian with small amounts of meat and dairy. This blood type has a difficult time digesting large amounts of animal protein and should keep these food sources to a minimum.
If you have Type AB blood and experience signs of sinus infections, respiratory problems or ear infections, it is suggested that you limit your intake of dairy products. Type AB sometimes experiences excess mucus when eating dairy products such as American cheese, butter and ice cream.