Blood type A - longer fertile, but also prone to alcohol

Carriers of this group have a higher risk of stomach cancer. Women with blood type A have the least number of eggs over time, so they are more likely to become pregnant at an older age. But they also have a higher risk of developing stomach cancer, especially if they smoke and drink alcohol frequently. There is also a link between blood type A and propensity for alcoholism, as well as obsessive compulsive disorders.

Blood type B - higher risk of ulcers, but also better metabolism

People with this blood type have a higher risk of memory problems and even senility and Alzheimer's disease in old age. They are also more prone to ulcers and inflammation caused by bacteria due to a slowed immune response to infection. However, they also have a faster metabolism, build muscle more easily and respond better to exercise.

Blood group 0 - lower risk of heart attack, but also lower fertility

These people have a quarter lower risk of heart attack and stomach cancer. Women with this blood type are likely to have fewer and poorer quality eggs, making them less likely to conceive. The good thing is that people with blood type O are quite resistant to stress - after traumatic events, their cortisol levels, the stress hormone, fall the fastest.

Blood type AB - prone to heart attack, but with better eyesight

Women with this blood type have a higher risk of developing ovarian cancer, and pregnant women with type AB have a higher risk of developing a condition of high blood pressure - preeclampsia. Members of this group have a higher risk of heart disease and heart attack, but also digestive problems, such as chronic gastritis. However, these studies show that after traumatic events, their levels of the hormone cortisol remain constant for a long time, which makes them less resistant to stress. But they are less prone to vision problems.