Naturopath Dr. Peter J. D’Adamo developed the theory that people with different blood types should eat more of certain foods while avoiding others. He believed that this would boost the immune system, help to control weight and the effects of aging, and fight cardiovascular disease, cancer, diabetes, and liver disorders. Here are a few tips for each blood type.
Those with blood type A should stick to a vegetarian diet consisting of fruits, vegetables, and grains. This is largely because this blood type appeared after the discovery of agriculture.
Oats are recommended for those with blood type A. Their main benefit is their high soluble fiber content. In addition, eating oats on a regular basis reduces the risk of coronary disease.
Whether it’s in salad, soup, or hummus, beets are recommended for those with blood type A because they’re rich in fiber but low in calories.
Perfect for vegetarians, lentils are rich in protein and minerals, allowing for a balanced diet without eating meat.
Cod is high in omega-3 and vitamin B12, which means that those with blood type A should include it in their diet.
The antioxidant qualities of strawberries make them an essential food for those with blood type A. They’re just as nutritious fresh or frozen.
As those with blood type A should stick to a vegetarian diet, all types of meat and dairy products should be avoided.
Certain vegetables are also not recommended, like eggplant, because it’s particularly prone to absorbing heavy metals when sprayed with pesticides or wastewater.
Crustaceans should also be avoided by those with blood type A, including crab and prawns, which are high in fat.
Although this fruit will help some people prevent cancer and boost their vitamin C, its high level of acidity makes it a no-go for those with blood type A.
Regardless of whether they’re mashed, in a salad, baked, or fried, those with blood type A should not include potatoes in their diet.
Unlike those with blood type A, people with blood type B—which was discovered in nomadic peoples—should follow a carnivorous diet.
Though often given a bad reputation, red meat does have some good qualities and is recommended for those with blood type B. In particular, it’s rich in vitamins B3, B12, and B6, as well as iron, zinc, creatine, and carnosine.
Although they’re too fatty for some, dairy products contain high levels of calcium, which is ideal for those with blood type B.
Rich in fiber, flavonoids, and vitamin C, green vegetables such as spinach and broccoli should be an integral part of the diet of those with blood type B.
Studies have shown that eggs contain choline, which is essential to developing brain function and memory. Those with blood type B are lucky that they can include them in their diet.
Those with blood type B should eat lots of lentils, beans, and chickpeas. They contain dietary fiber and are good for controlling diabetes, cardiovascular disease, and colorectal cancer.
Although a meat-heavy diet is recommended for those with blood type B, they should avoid chicken, turkey, and duck.
Soy is a definite no-no for those with blood type B. Since tofu is a soy product, it should also be banished from their diets.
Pork is another type of meat that those with blood type B should avoid. Certain religions, such as Judaism and Islam, have even banned eating this meat.
While those with blood type B should eat as many green vegetables as possible, they should avoid other vegetables, including radishes, even though they’re high in potassium, vitamin C, and calcium.
Often used to make couscous, this food item should be avoided by those with blood type B who can, nevertheless, eat other types of grains.
For those with blood type O, which appeared in around 50,000 BC during the hunter-gatherer period, it’s a good idea to eat lots of foods that are rich in protein but low in carbohydrates—and to get lots of exercise.
Veal, the meat of young cows, is classified as a white meat. It’s high in potassium, calcium, and vitamin B12. Veal is recommended for those with blood type O.
Recommended for those with blood type O, trout contains lots of omega-3. Eating this fish reduces the risk of coronary disease, depression, and Alzheimer’s.
Without a doubt, bananas are the fruit with the highest level of potassium and are known for providing active people with the energy they need. They’re an essential food for those with blood type O.
Onions, shallots, green onions, and leeks are recommended for those with blood type O. They’re high in folic acid and excellent for brain function—as well as emotional and mental health.
Those with blood type O should try to eat lots of cabbage, one of the best cancer-fighting foods. It’s also very effective in controlling body weight.
High in carbohydrates, grains aren’t usually recommended for those with blood type O.
The link between eggs and bad cholesterol is still being debated, but those with blood type O should avoid them all the same.
Those with blood type O should stop eating avocados altogether, as they’re particularly high in fat.
They may seem harmless, but cucumbers should be avoided by those with blood type O. This vegetable is one of the most absorbent when it comes to pesticides that can be harmful to your health.
Unfortunately, those with blood type O should not eat this summer fruit. Its high water content means it often provides a false feeling of hydration.
Those with blood type AB can have the most flexible diet of all, as their blood type was the last one to appear and is a mixture of type A (of European origin) and type B (of Mongolian and Caucasian origin).
Even though red meat often gets a bad reputation, lamb is recommended for those with blood type AB. This type of meat is high in energy and fatty acids, which control levels of bad cholesterol and the risk of coronary disease.
Highly recommended for those with blood type AB, plums are one of the best foods for maintaining good gut bacteria.
Red berries are rich in antioxidants but low in calories. Those with blood type AB should eat them several times a week.
Wheat is the most common of all grains. Whether as bread or pasta, it should be integrated into the diet of those with type AB.
Almonds, cashews, sunflower or pumpkin seeds: all varieties of nuts and seeds are high in protein and good for those with blood type AB.
Even though those with blood type AB can eat almost any type of meat, they should avoid chicken.
Even though it’s delicious in pies or jams, rhubarb should be avoided by those with blood type AB, mainly due to its high acidity.
Legumes are widely praised for their health benefits, but they’re hard to digest for those with blood type AB. It’s worth noting that peanuts are actually legumes.
Whether green, red, orange, or yellow, peppers should be avoided by those with blood type AB, who should get their vitamins elsewhere.
As they tend to be very high in fat, crustaceans—including prawns, crab, and lobster, but also other types of seafood such as oysters and mussels—should be avoided by those with blood type AB.