Blood Type O Diet Foods


The Blood Type Diet is a diet developed by Dr. Peter D’Adamo, author of Eat Right For Your Type. He believes a chemical reaction occurs in the body between the food you eat and your blood type, caused by lectins (food proteins that affect the blood). Consuming foods with incompatible lectins can have adverse affects on your body and stress levels. While our immune system protects us from most lectins, a small percentage manages to pass into our bloodstream and can cause inflammation, bloating, slow metabolism and even cancer.

By following the Blood Type Diet, you can avoid foods with incompatible lectins. Each blood type has its own list of foods that fall into three categories: Highly beneficial, Foods allowed and Foods not allowed. The diet also suggests lifestyle and fitness changes to best benefit your health based on your blood type.

Guidelines for Type O

According to Dr. Peter D’Adamo, it is important for Type Os to participate in rigorous exercise and consume a sufficient amount of animal protein. Due to the acidity of a Type Os muscle tissue, they are able to easily digest and metabolize meat. However, due to this high level of acidity, Type Os are more prone to ulcers than the other blood types. It is suggested that Type Os purchase a licorice preparation called DGL which can help soothe the stomach and protect the stomach lining from the high levels of acid.

Type Os also tend to have low levels of the thyroid hormone or unstable thyroid functions. This can cause weight gain, fluid retention and fatigue. Therefore, it is important for Type Os to avoid foods that affect the thyroid hormone, such as whole wheat products, cabbage, brussels sprouts and cauliflower.

Dr. D’Adamo suggests Type Os exercise regularly, for at least half an hour, four times a week. 

Recommended Blood Type O Diet Foods

  • Lean red meats
  • Fish and seafood
  • Poultry
  • Eggs
  • Olive oil
  • Pumpkin seeds and walnuts
  • Most fruits and vegetables (avoid avocados, brussels sprouts, cabbage, cauliflower, blackberries, oranges and strawberries)


Dr. Lam, Blood Type Diet

Dr. D’Adamo, What Makes A ‘Type O’ An Individual?

WebMD, The Eat Right for Your Blood Type Diet

Beau Giannini
Beau Giannini