Diet by blood type: myths, facts and the right diet

For several years now, the popularity of the so-called blood type diet has not faded among healthy lifestyle adherents and simply fans of experimenting with nutrition. But how effective is it in reality, and what products should you stock up on for those who nevertheless decided to try it on themselves?

Blood type nutritionists often quote the catchphrase of Hippocrates: "We are what we eat." However, this phrase means rather only that our health largely depends on nutrition, therefore, in the context of a diet by blood group, it would be appropriate to paraphrase: "We eat what we eat" since its principle calls for eating what, supposedly suitable for a certain blood type. However, in recent years, this type of diet has increasingly become the object of sharp criticism among nutritionists. What is hidden behind the most popular diet of recent years - we understand the nuances of the issue together with an endocrinologist, nutritionist.


History of the issue

To prove or refute the theory of the influence of the type of nutrition on the human body, depending on the blood group, experts have conducted about one and a half thousand studies, but, alas, most of them did not confirm the theory of the author of the diet - nephropathy Peter D'Adamo, who popularized it in 1996, with the release of the book Four Blood Types - Four Lifestyles. It should be noted, however, that the promoter of this diet is not a practicing physician, and his bestseller lacks the evidence base and links to scientific research on this issue.


In his book, D'Adamo carefully gives advice that is rather hypothetical and re-commendatory, lacking scientific justification. However, in general, the nutrition proposed by a nephropathy reflects the principles of those diets, the observance of which will lead to an improvement in well-being and even to a slight weight loss, regardless of what blood group you have, since it limits the use of easily digestible carbohydrates, fatty foods, alcohol, strong tea, coffee, and carbonated drinks.

The author of the diet himself does not give guarantees for significant weight loss, but only mentions a possible loss of 3-4 kilograms. He also emphasizes that Rh factor, gender, and age do not play a significant role in choosing the type of diet, although he, in another book of his authorship, "Four blood groups - four paths to health" make minor differences in dietary recommendations for carriers of positive and negative Rh factor, which was also not confirmed in scientific research.


Thus, today, most dietitians recognize this diet as one of the types of dietary nutrition, which in some cases has a positive effect on the body. Nevertheless, you should talk about the basic principles of this diet to understand whether it is worth following.


Blood group nutrition system

So, according to the theory of Peter D'Adamo, the features of metabolism, a tendency to certain diseases, intolerance to certain foods, character, temperament, lifestyle in people with different blood groups are different, since they were formed under the influence of the lifestyle and nutrition of ancient people. The author associates these differences with proteins lectins that are contained in foods, and each blood group secretes its lectins, which negatively affect the body, in particular, there is an assumption that they stick together red blood cells, forming clots (blood clots).


Here it is immediately worth mentioning that this hypothesis has not been confirmed in scientific circles, since most of the lectins are destroyed even during cooking. The author divided the products for each blood group into useful (improve metabolic processes), neutral (do not affect the functioning of the body), and harmful (break down to form harmful and toxic substances).


  • I blood group

Holders of blood group I (O) as the most ancient and most common (about 40% of the population) are mainly meat-eaters, or "hunters", therefore, for good health, they should adhere to a meat diet close to the Paleo diet: the predominance of protein due to meat, fish, poultry with limited carbohydrates, grains and legumes.


Allowed: meat (beef, lamb, turkey) and offal, fish (cod, hake, trout, pike, sturgeon), olive and flax-seed oil, soy products, seaweed, walnuts, pumpkin seeds, herbs (parsley, spinach, watercress) - salad, onions, sweet potatoes), vegetables (broccoli, pumpkin, turnips, beets, kohlrabi), fruits and berries (apples, plums, figs, cherries, cherry plums).


Not recommended: pork (including lard, ham, bacon), goose, duck, corn, peanut, cottonseed, soybean oil, beans, lentils, fish (catfish, catfish), and smoked, salted, and pickled fish, caviar, products from wheat, corn and oat flour (white bread, pastries, pasta, oatmeal cookies, crackers), oatmeal, corn, muesli. Milk, dairy products, cheese, ice cream, spices, pickles, marinades, ketchup, sauces, vegetables (white cabbage, red cabbage, and Brussels sprouts, rhubarb), champions, strawberries, blackberries, oranges, tangerines, avocados, olives, coconut, sweet carbonated drinks, strong tea, coffee, alcohol.


  • II blood group

The author calls people with II blood group (A) "farmers". There are almost as many of them as the owners of group I (about 39%). From the name it follows that in the diet of representatives of the II blood group, products grown in the ground and on the ground should prevail, that is, vegetables, fruits, legumes, gluten-free grains. Since animal proteins and fats in people with blood group II, according to D'Adamo's theory, are poorly digested, it is recommended to significantly limit the consumption of meat, dairy, and fermented milk products, as well as coffee and alcohol.


Allowed: fish, all vegetables, almost all fruits (except those listed below), green tea.


Not recommended: meat (beef, veal, lamb, lamb, pork, rabbit, duck, goose), squid, baked goods, oranges, tangerines, bananas, olives, strong tea, coffee, alcohol.


  • III group

Carriers of III blood group (B), or "nomads", are much less common - only 15% of the world's population have this group. They are allowed vegetables, fruits, dairy and sour-milk products, any meat except chicken. It is not recommended to eat seafood, tomatoes, wheat flour products.


Allowed: meat (any other than chicken), vegetables (beets, carrots, broccoli, eggplant, peppers, cabbage), eggs, legumes, any fish, caviar, rice, oatmeal, milk, yogurt, cottage cheese, low-fat cheeses, fruits (bananas, apricots, plums, pineapple), green tea, juices.


Not recommended: seafood, sunflower, soybean, corn oil, corn, buckwheat, barley, wheat, rye, tomatoes, coconuts, pears, pomegranates.


  • IV group

The fourth blood group (AB) is the youngest in evolution: only 6% of the world's population has it. This group is formed by the fusion of genes of the second (A) and third (B) groups and, according to D'Adamo, inherits the traits of both groups II and III, therefore the type of nutrition for owners of group IV should be mixed, that is, almost omnivorous. You can eat meat (except red), fish, dairy, sour-milk products, legumes, grains, vegetables, and fruits. Beef, corn, beans, alcoholic beverages should be excluded from the diet.


Allowed: poultry, rabbit, fish, dairy and sour-milk products, olive and ghee, legumes and nuts, cereals (except for buckwheat), vegetables (except for avocados, olives, radishes, peppers, corn), and fruits (except for bananas, persimmons, oranges, pomegranate, mango), weak coffee, green tea.


Not recommended: red meat, seafood (shrimp, shellfish, crabs), whole milk, ice cream, beans, corn, sunflower, sesame, corn, cottonseed oil, buckwheat, black tea, alcohol.


About contraindications

If you do decide to try a blood type diet on yourself, you must take into account some contraindications associated with it. These are, first of all, pregnancy and breastfeeding, ontological diseases, immunodeficiency, infectious and viral diseases in the acute stage, diabetes mellifluous, serious cardiovascular diseases, as well as some diseases of the gastrointestinal tract. In any case, with a radical transition from one type of food to another, a doctor's consultation is recommended.

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