The Best Foods for Blood Type O Positive

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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.

A physician takes a sample of blood.
A physician takes a sample of blood. (Image: Keith Brofsky/Digital Vision/Getty Images)

Significance

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.

A doctor talks to a patient that is donating blood.
A doctor talks to a patient that is donating blood. (Image: Keith Brofsky/Digital Vision/Getty Images)

General Recommendations for Type O

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. 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).

Skewers of meats vegetables on a plate.
Skewers of meats vegetables on a plate. (Image: George Doyle/Stockbyte/Getty Images)

Recommended Fruits and Vegetables

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. Artichokes, okra, garlic and red onions, yams, turnips, pumpkin, chard, red peppers, and leafy green vegetables like kale, collard greens, broccoli, romaine and spinach are also recommended. Vegetables and fruits which Type O's should avoid include avocado, olives, potatoes, mushrooms, corn, eggplant, cauliflower, cabbage, Brussels sprouts and mustard greens. Type O's should also avoid honeydew, strawberries, cantaloupe, oranges, tangerines and blackberries, orange juice and apple juice.

A basket of figs on display at a market.
A basket of figs on display at a market. (Image: Jupiterimages/Photos.com/Getty Images)

Foods to avoid

Type O's should avoid goose, pork and all pork products such as ham, ribs, bacon, and 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. Also avoid black or white pepper, vinegars, corn syrup, coffee, soda, all distilled liquor and black tea.

A close up of a ham and cheese sandwich.
A close up of a ham and cheese sandwich. (Image: Ciaran Griffin/Stockbyte/Getty Images)

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. 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.

A selection of olive oils.
A selection of olive oils. (Image: Jupiterimages/Comstock/Getty Images)

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. According to Peter D'Adamo, failure to eliminate stress via exercise could result in depression and insomnia, asthma, arthritis, and obesity.

A woman runs on the beach for exercise.
A woman runs on the beach for exercise. (Image: Jupiterimages/Pixland/Getty Images)

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