All About Blood Type Diet

blood type diet

The blood type diet provides a special diet for each blood group. How this is supposed to work and what exactly is behind the blood type diet, you can find these in our article.

According to the inventor of the blood type diet, different foods should be better tolerated than others due to the evaluation for each blood group. But can you really lose weight thanks to an individual diet plan that has been adapted to your blood group?

What is the blood type diet?

The blood type diet was created in the 90s by the naturopathic physician Dr. Peter D’Adamo. In this, the physician assumes that each blood group is evolutionarily aligned for very specific foods. That means, an optimal food supply of the body is determined according to this theory by the respective blood group type and decides over it, which food makes us fat or slim.

Overall, the diet is characterized by unprocessed and relatively healthy foods. You can find out which foods are meant for which blood type in the following chapter.

How does the blood type diet work?

According to the medical profession, there are various antibodies in our blood that react with certain proteins in the foods. However, according to D’Adamo, if the foods do not match the blood type, the blood is said to “clump together” and a defensive reaction is the result.

However, if the “matching” foods are consumed, our bodies are said to become leaner, more vital and healthier. In addition, the doctor includes the so-called secretor status, which provides information about whether blood group antigens are present in body fluids such as saliva. For the naturopathic doctor, this is another key factor in food selection.

Individual dietary types for you:

Blood type 0: Hunter.

This blood type was especially common among hunters about 40,000 years ago. At that time, the diet focused primarily on meat. Thus, during the diet, people with blood group 0 should eat mainly animal and thus protein-rich foods such as meat, fish, poultry, but also fruits and vegetables. Legumes, cereals and dairy products, on the other hand, should be avoided. It is thus strongly reminiscent of the Paleo diet.

Blood type A: Farmer

According to the theory, this blood type should have appeared specifically in sedentary people, who fed mainly on plant foods. For people with blood type A, therefore, it is called fruit and vegetables full. Legumes, grains and seafood are also allowed – but overall more along the lines of a vegan diet, as cow’s milk products should be avoided. Wheat is also not recommended in this context.

Blood group B: Nomad

Here a balanced diet is central. Blood group B is said to have originated apparently in the time when people fed on dairy products, vegetables and eggs. Thus, the above-mentioned foods, as well as meat and cereals, are on the menu. Poultry, wheat and rye products are apparently not compatible for the “nomad”.

Blood group AB: The enigmatic one

Enigmatic because there is no specific food group in the foreground. The blood group is said to have originated when the peoples of A and B intermingled. According to the theory, people with blood group AB, which, however, occurs rather rarely, tolerate all foods well. Thus, this type of diet is characterized by mixed food, i.e. meat, vegetables, fruits, cereals and legumes. However, the consumption of meat should rather be in smaller quantities.

Other important information about the diet: five meals are taken daily. Nutritional supplements are recommended to prevent any nutrient deficiencies. The daily calorie count is between 1500 and 1800 kilocalories and should result in weight loss.

Which foods can be on the menu for all blood types?

You can consume these foods without hesitation:

In addition to the respective foods that are allowed per blood type, the following foods may also be consumed:

– fresh and unprocessed fruits and vegetables

These foods are taboo

– processed foods such as convenience foods

– high-calorie and high-fat foods

– wheat

– beans

Wheat is rated as a “fattening grain” in the blood type diet and should therefore be largely avoided for all blood types. In addition, according to the inventor of the diet, so-called lectins (certain proteins) contained in certain legumes such as kidney beans, but also in wheat, are unfavorable. These are apparently to provide for the agglutination of the red blood corpuscles and to release different disturbances in the body.

How to get started

Before you start the blood type diet, it is important to consider a few things in advance. Acquiring background knowledge of the diet is advisable at first, so that weight loss success can also be achieved. You should also be informed about which blood group your blood belongs to in order to choose the right diet. You can have this determined by your family doctor by taking a blood sample.

As a further preparatory step, an intensive study of the respective foods is recommended. This way you will know exactly which foods are suitable and which are not. This will make shopping and preparing meals easier. In addition, you can save time in this way. For working people, it makes sense to pre-cook the meals and heat them up in the office. Going out to eat is rather difficult during the blood type diet because of the explicitly selected foods.

To avoid constant shopping, it can be quite useful to pre-plan the meals for the whole week and thus go shopping only once a week. This way you have an exact overview and save time.

Advantages of the blood type diet

Each diet is based on a diet with fruits and vegetables and few processed products. If you have previously tended to eat fatty and high-calorie foods, the blood type diet can be a useful introduction to a change in diet.

In addition, the diets can be customized. It is recommended to select the respective food depending on the blood group. However, since all diets are based on a largely healthy diet, you can also adapt and swap them as you see fit. Integrating exercise into your daily routine is also very important, along with proper nutrition.

Disadvantages of the blood type diet

Unfortunately, there are some points about the blood type diet that do not necessarily speak in favor of its implementation. First, there is no scientific evidence that the type of diet actually correlates with the particular blood type. So, whether the recommended diet actually has positive effects on our body due to the specific foods depending on the blood group is more than debatable.

Scientists have found a correlation between the diet and a reduced risk of heart disease, but have not been able to attribute this finding to a person’s blood type. This means that the basic idea of the diet is strongly questioned.

Also lacking is scientific proof in relation to so-called lectins (proteins) that are said to clump with our blood when we eat the “wrong” diet (not matched to our blood type). However, these proteins enter our blood only in small quantities and are broken down during digestion. They also lose their effect when heated.

Another disadvantage of the blood type diet is the rather inflexible diet plan. Since the foods are very strictly prescribed depending on the blood group, it is rather difficult if you like to have your meal in canteens or restaurants. Spontaneous appointments to eat are therefore somewhat difficult, which makes it much more difficult to persevere.

In addition, nutrient deficiencies can occur due to the sometimes very one-sided diet. This is because not every single recommendation represents a healthy and balanced diet. For example, people with blood groups 0 and A should avoid dairy products, which is why a calcium deficiency is possible. Therefore, dietary supplements are often recommended in this context.


During the implementation of the blood type diet, it is helpful to pre-cook the portions and also freeze them if necessary. This will save you time and unnecessary stress. Frozen fruits and vegetables can also be used.

It is also recommended to use only unprocessed products, so there is no need to search the ingredient lists for named lectins.

Overall, it should be noted that the blood type diet should be seen more as an introduction to a change in diet and should also not be practiced for a long time due to nutrient deficiencies. For successful weight loss, this diet is probably rather less useful.

The basic idea of the blood type diet is to use the individual blood groups as the basis for the diet form. According to the concept, each individual blood group has evolved over the course of evaluation and is therefore only compatible with certain foods.

Overall, the diets are based on lots of fruits and vegetables, but they are also one-sided, so nutrient deficiencies can result. There is no scientific evidence between a correlation of blood type and the diet in question. In addition, weight loss is not always predictable. Consequently, the blood type diet should rather be seen as an introduction to a change of diet.

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