Every human being has one of four blood types--A, B, A/B or 0. In the early 1900s, Japanese scientists put forth the theory that certain behavioral and personality traits were associated with blood type. Some scientists believe that nutritional needs and propensity towards certain diseases are also related to blood type.


Dr. James D'Adamo and his son Dr. Peter D'Adamo are leaders in the theory of blood type differences. Their studies on blood types and health theorize that some blood types are more susceptible to certain illnesses, live longer, do better on certain diets, and are more emotionally resilient than others. Many researchers believe that blood type is more an indicator of who we are genetically than our race.

General Recommendations for Type O

Food List for Blood Type B Diet

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Reported to be the most basic and oldest blood type of early man (the "hunter"), Type O's tend to be strong-willed survivors with sturdy immune systems 1. It is generally recommended that the Type O diet contain plenty of animal products supplemented with vegetables and fruits to avoid over-acidification (which could result in stomach ulcers).

Though fruits and vegetables are highly nutritious and full of fiber, there are several fruits and vegetables that can cause problems for Type O's. Most fruits are neutral, but figs, plums and prunes are highly beneficial. Vegetables and fruits which Type O's should avoid include:

  • avocado
  • olives
  • potatoes
  • mushrooms
  • corn
  • eggplant
  • cauliflower
  • cabbage
  • Brussels sprouts
  • mustard greens

Foods to avoid

Blood Type B Food List

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Type O's should avoid goose, pork and all pork products such as:

  • ham
  • ribs
  • bacon,
  • sausages

Dairy products (eggs, cheese, yogurt and milk) are considered to be a poor protein source for Type O's. Dairy and eggs are not advised at all for Type O's of African descent, and only in small amounts for Caucasian or Asian Type O's. Whole wheat products should be eliminated from the diet, as they react negatively with your blood and cause sluggishness and weight gain.

Fats, Seeds and Nuts

Fats provide important nutrition to Type O's, and have a positive effect on the heart and arteries of this blood type 1. Recommended fats and oils include olive or flaxseed oil, pumpkin seeds, walnuts, and nut butters. Adzuki or pinto beans and black-eyed peas are also highly beneficial for Type Os.

Expert Insight

Exercise is of vital importance to your health due to the effects stress has on your body. To lose weight, Type O's must engage in vigorous physical exercise 30 to 60 minutes three to four times per week.