Eat Right For Your Blood Type. How Genetics can influence the way your body processes food.

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In his book, The Eat Right Diet, Dr. Peter D’Adamo states that “Your blood type is the key that unlock the door to the mysteries of health, disease, longevity, physical vitality and emotional strength.”

This might seem like a far fetched claim, but after reading the book, it just makes so much sense that your blood type can play a huge role in the way your body functions.
Dr. D’Adamo is a second -generation Naturopathic Physician. His father was Dr James D’Adamo, who after completing his studies, worked at several of the great Spas in Europe. He was intrigued by the fact that many patients did well on vegetarian and low-fat diets, which was the norm at health spas, but some of the patients did not improve, and some even worsened. He started to wonder if blood type could have something to do with it, as blood was the fundamental source of nourishment to the body.

Dr James D’Adamo set about testing his patients blood type, and noticed through the years and with countless patients, that a pattern emerged. He condensed his observations in a book One Man’s Food, which was published in 1980. At the time, Dr Peter D’Adamo was in his 3rd year of Naturopathic Studies.
He wanted to research his father’s blood type theory, to make sure that it carried valid scientific weight, and started scanning medical literature to see if there was evidence of a correlation between the blood types and predilection for certain diseases. He started finding evidence that certain diseases were related to blood type. For instance, two major diseases of the stomach were associated with blood type. The peptic ulcer, which is caused by higher than average stomach acid levels, were reported to be more prevalent in people with type O blood than any other blood type. The other was stomach cancer, which was often linked to low levels of stomach acid production, and seemed to occur more in type A blood individuals. Interestingly, pernicious anemia, another disorder found in Type A, is related to a lack of Vitamin B12, which requires more stomach acid for it’s absorbs ion.

This encouraged Dr D’Adamo to continue the work his father had done, and to build it on a scientific basis. The result of his years of research resulted in his book, The Eat Right Diet. In his book he explains the different blood types, and outlines all the foods which are Beneficial, Neutral and which to avoid. He also shows how foods affect weight gain or loss, and gives a menu for meal planning, with some great recipes. In his book he also advises on which supplements to take for every blood type, which exercise suits blood types the best, and even the personality traits which each individual blood type might be.

I recommend that you get your hands on Dr Peter D’Adamo’s book, The Eat Right Diet, to fully understand the complete science of the Blood Type Diet, and learn more about individual blood types. I have just outlined some of the basics below if you are interested in following the eating plan.



Type O. This is the most common blood type, which an estimated 46% of the population belongs to.

The Type Os do very well on animal protein. As Type Os were the first known blood group which originated millions of years ago, they were used to the high-protein diet of the hunter-gatherer. They thrive on meat like Beef, Lamb, Liver, Venison and offal. They can also eat Chicken, Duck, Rabbit, Turkey and Pheasant, in moderation. Meats they should avoid is Bacon, Goose, Ham and Pork.

They also do well on certain seafood, like Cod, Hake, Salmon, Rainbow Trout and more. Seafood which they can eat in moderation, are Abalone, Carp, Clam Crayfish etc. Seafood to avoid are Barracuda, Catfish, Caviar, Herring and Smoked Salmon.

Dairy Products and Eggs. Type Os should restrict their use of dairy products severely. Your system is not well-designed for the metabolism of dairy products and eggs. Use Soya milk and soya cheese as an alternative. Make sure to take a daily calcium supplement however. Things like Butter, Feta Cheese, Goat’s Cheese and Mozzarella can be eaten occasionally. Avoid Blue cheese, Brie, Buttermilk, Camembert, and Cheddar cheese amongst others.

Vegetarian Diet


Type A. Type As flourish on a vegetarian diet. They are not well adapted to eating red meat,
because of the low stomach acid production. To get the most benefit from their food, Type As should eliminate all meats from their diet. This can be very difficult in this day and age, but you should really try to look at this with an open mind. Try to substitute meat with fish several times per week. Poultry is preferable to red meat, but when you do eat meat, choose the leanest cuts you can find.

like Chicken, Poussin and Turkey is neutral, so you can eat this up to 3 times per week. Avoid Bacon, Lamb, Liver, Mutton and all other red meats. Processed meat like ham, viennas and cold meats are a definite no-no.

Type As can eat seafood in moderation, three or four times a week. Stay away from sole and plaice, as they have a lectin that can irritate the Type A digestive tract. You should also not eat some seafood like Anchovy, Barracuda, Bluefish, Clams and Crayfish, amongst others.

Dairy Products and Eggs.
Type As can have small amounts of fermented dairy products like Kefir, Yogurt and Cultured Dairy products. They should not avoid whole milk, and instead have Raw Goat’s Milk. Also, Soya milk and soya cheese is a good calcium substitutes for Type As. Eggs can be consumed in moderation, and make sure that it is organically produced.

Type B Diet


Type B. Type Bs represent a sophisticated refinement in the evolutionary journey, able to adapt
to circumstances. Sometimes they resemble the type Os, and at times have their own unique shape. On the whole, Type Bs are quite resistant to many of the severe diseases common in modern times, such as heart disease and cancer. The Type B diet is balanced and wholesome, including a wide variety of foods, including the animal and vegetable kingdoms.

Type Bs do well on red meats like Lamb, Mutton, Rabbit and Venison. They can also eat Beef, Liver, Pheasant, Turkey and Veal in moderation. It is best to avoid Chicken, as chicken contains a Blood Type B agglutinating lectin in its muscle tissue. This has the potential to lead to stroke and immune disorders. Other meat like Bacon, Duck, Goose, Ham, Pork and Heart is also best to be avoided.

Type Bs thrive on seafood, especially the deep-sea fish like cod and salmon. White fish such as cod, halibut, hake and sole, are great sources of protein for Type Bs. They can also enjoy seafood such as Abalone, Tuna, Rainbow Trout and Salmon among others in moderation. Some of the things to avoid include Anchovy, Barracuda, Clams, Crab, Crayfish, Octopus and a few others.

Type B is the only blood type that can fully enjoy a variety of dairy foods and eggs. They can enjoy Cottage Cheese, Feta Cheese, Goat’s Cheese, Kefir, Milk, Mozzarella and Ricotta cheese, as well as Yogurt. Other dairy products like Brie, Butter, Buttermilk, Cheddar Cheese and some others, can be eaten in moderation. The only dairy products you should avoid is Blue Cheese and Ice-cream.

Olive Oil is very good to encourage proper digestion and healthy elimination for Type Bs. Ghee can be used in cooking, but avoid, sesame, sunflower and corn oils, which contain lectins which are damaging to the Type Bs digestive tract.


Blood Type AB. This blood type is the rarest of the blood types, only 2 – 5 percent of the world’s
population. It is less than a thousand years old, and biologically complex. It is a combination of A and B, but also complex. The Type AB diet requires reading of both Type A and Type B lists to better
understand the diet.

When it comes to eating meat, Type Abs need some animal protein, like Lamb, Mutton Rabbit and Turkey, instead of beef. They should also try to avoid chicken. Smoked and cured meats should be avoided, as these can cause stomach cancer, as Type Abs also have low stomach acid, as do Type As. Chicken, calf and pig liver and pheasant can be eaten on occasion.

Seafood is an excellent source of protein for Type Abs. There is a wide variety of seafood that they can eat, but some seafood like Anchovy, Barracuda, clams, Crab, Crayfish, Shrimp and a few others need to be avoided.

With Dairy Products and Eggs, Type Abs can follow the same guidelines as the Type B diet. Dairy products like buttermilk, yogurt, kefir and sour cream are easily digested. Cottage cheese, Farmers cheese, Goat’s milk and cheese, and Mozzarella is very beneficial. You just have to watch out for excessive mucus, and signs of respiratory problems, then cut back on dairy foods. Eggs are also beneficial, but you have to watch out for high cholesterol, so use 2 egg whites with only 1 egg yolk to lower cholesterol intake. Type ABs should however avoid Blue Cheese, Brie, Butter, Camembert and Ice-cream.


There is so much more information on all the foods you can and can not eat in the book, as well as a lot of information on blood types, so do yourself a favor, and order it to read this very interesting and informative book. Dr D’Adamo has written a number of books on the diet after the first one, The Eat Right Diet.Eat Right For Your Type was published in 1996, and Live

Right For Your Type, and Change Your Genetic Destiny followed. I am
sure that by following the diet, it is possible to not only lose weight, but make a difference in the way you feel, and in preventing disease.

About Mariette Chapman 12 Articles
I have always loved living a life as close to nature as possible. I believe in eating a healthy, natural diet, and treating common ailments with natural herbal remedies as far as possible.

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