Basically,
* Type A types
should basically stick to fruits and zvegetables (high carbs / low fat).
They have thicker blood than other blood types, a sensitive immune system, and should not consume dairy products, animal fats and meats.
Hey, what's that crap ? I can't eat meat !?
They are at a heightened risk for cardiovascular disease, diabetes and cancer.
* Type B types
should consume a balanced diet (fruits and vegetables, grains, fish, dairy, meat, but avoid chicken).
They have the best chance of bypassing or overcoming everyday types of diseases, including heart disease and cancer.
* Type AB types
should consume a mostly vegetarian diet, and only on rare occasions some
fish, meat (no chicken), and dairy.
* Type O types
should basically stick to a high protein diet (including red meat), low carbs, and
enriched with fruits and vegetables. They should limit the intake of wheat germ, whole wheat products, corn, and avoid dairy products and most nuts.
Type O types are commonly affected with hypothyroidism, high stomach acid
(leading to ulcers), and thinner blood with greater resistance to blood clotting.
based on Peter D'Adamo's research