How should we choose our diet according to blood type?

The term blood group (or blood group) is used to characterize an individual’s blood based on the presence or absence of an antigen on its erythrocyte surface.

Following the medical news of the last months, we see how important it is to know our blood type in order to be able to donate and receive blood in medical cases where it is required.

Knowing the blood type is essential in both pregnancies, for both partners.

Apparently, human blood is similar, but laboratory tests identify differences depending on the presence or absence of an antigen on the surface of red blood cells. Antigens are substances that the body does not recognize as its own, which causes an immune response from it, which aims to neutralize and eliminate them.

The red cell groups of the AOB system are: A, B, AB, and O, the letters symbolizing the two antigens called A and B. – Blood group A, has only antigen A – Blood group B, has only antigen B – Group of blood AB, has both antigens – Group O has none.

Thus, there are 4 main blood groups in system AB0:

  • Grupa (Landsteiner) 0, A, B, AB
  • Group (Janský) I, II, III, IV
  • Aglutinogen (antigen) A, B, A si B
  • Aglutinine (antibody) α și β, β, α

RH blood factor (Rhesus) is another feature that refers to the presence of a specific protein on the surface of red blood cells. The presence of this protein determines the positive Rh, and its absence, the negative Rh.

Nutrition according to blood type

The blood type we have is closely related to our body’s ability to digest certain foods. Thus, it is advisable for each of us to establish our diet according to blood type, in order to live better and longer.

This statement was popularized by Dr. Peter J. D’Adamo in his 1996 book “Adequate Food for the Four Blood Groups.”



  • Meat consumer;
  • Vigorous digestive tract, but with increased acidity;
  • Hyperactive immune system;
  • Intolerance to adaptations to diet and the environment;
  • Optimal response to stress through intense physical activity;
  • It requires an efficient metabolism to be supple and energetic through increased intake of iodine and calcium;
  • In terms of personality, group O carries a genetic memory of strength, endurance, boldness, confidence, concentration, action and a developed sense of self-preservation.

Protein-based diet is recommended: lean fish, chicken, beef, as fresh as possible without the addition of preservatives and other additives.

Industrially prepared sausages should be avoided. Very beneficial are seafood (sources of iodine, regulates thyroid function) which should be a major component of the group O diet.

People with group O should reduce dairy products, especially sweet milk (lactose intolerance).

Because calcium is very necessary, marine sources are recommended: crayfish, algae, seashells (pharmaceutical calcium supplements do not bring you any benefit). Among oils and fats, olive oil is recommended.



  • The first vegetarian
  • Pick what you plant
  • Sensitive digestive tract
  • Tolerant immune system
  • Predisposition to heart disease, diabetes
  • Responds best to stress through calming actions
  • It adapts well to the environment and diet
  • It requires a vegetarian diet to stay slim and active

For people with group A, a vegetarian diet is suggested. These people are said to have low gastric acid levels and do not digest animal protein and fat very well.

Therefore, they are recommended to eat a lot of fruits, vegetables and grains. It is important that these foods are eaten in a natural, fresh state, without added ingredients.

Following a group A diet increases immunity and the risk factors that generate certain diseases specific to this group can be avoided: heart disease and diabetes.



  • Balanced
  • Strong immune system
  • Tolerant digestive tract
  • Consumer of dairy products
  • The most flexible diet options
  • Responds best to stress through creativity
  • It requires a balance between physical and mental activity to stay supple and active

Blood group B is in many ways similar to blood group 0.

People with group B are generally resilient and agile, able to withstand many of the most severe diseases of the modern age, such as heart disease and cancer.

According to D’Adamo, people with group B are omnivorous and can eat a wide variety of foods. However, foods such as corn, wheat, tomatoes and peanuts can cause them to gain weight, fatigue and hypoglycemia.

Another food that people with this blood type should avoid is chicken.

Although it is a lean meat, it can increase the risk of stroke and can cause immune problems. It is recommended to replace chicken with pork, sheep or rabbit.



  • The modern fusion between groups A and B
  • Chameleon-type response to changing environmental and dietary conditions
  • Sensitive digestive tract
  • Excessively tolerant immune system
  • Responds optimally to stress in spiritual, physical and creative energy
  • An evolutionary mystery

Blood group AB is less than 1000 years old, is very rare (5% of the population) and biologically complex, representing a fusion of the characteristics of groups A and B.

The body of those with group AB does not produce enough gastric acid to digest large amounts of animal protein. The solution is to reduce the amount of chicken and beef.

Eggs, seafood and green leafy vegetables are good for people with blood type AB. Also, for easier digestion, these people are recommended to eat smaller and more frequent portions.

Source: Doctorul Zilei by

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