Jun 6, 2022
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How do people with the second blood type differ from the rest?

How do people with the second blood type differ from the rest?

It seems that the time when people were looking for their other half according to the horoscope is passing. Now, even in Japan, when meeting people, they find out what kind of blood type a person has. Moreover, in this country, this factor is also important when applying for a job. Moreover, devices for express analysis of the blood group are installed everywhere in Japan: at train stations, department stores, restaurants.

Japanese employers are sure that if you bring people with certain blood types into one team, you can form an ideal team. This selection method is called “ketsu-eki-gata”. For the first time in the Land of the Rising Sun, they started talking about him in the thirties of the last century. And one of the Japanese prime ministers, Taro Aso, who made public his blood type II, “suffered” from the same method. Its owners, according to Japanese researchers, are characterized by stubbornness and irritability. Probably, these features were not liked by the voters.

Bloody Nobel Prize

The fact that blood moves through the vessels was discovered by the English physician William Harvey in the 17th century. Prior to this, people tried to compensate for the lack of blood by giving them blood to drink. Of course, it didn’t help. Harvey’s discovery prompted another English physician, Richard Lower, to make the world’s first blood transfusion. The experiments were carried out on dogs. It was in 1665. Two years later, Lower repeated his experience by transfusing blood from a sheep to a man. Surprisingly, the patient survived. However, this was by chance. All subsequent attempts at such a transfusion ended in the death of the patient.

The era of mass blood transfusion began in 1818, when again the British obstetrician James Blundell saved the life of one of his patients, who had lost a lot of blood during childbirth. He transfused her husband’s blood, the woman survived. But for almost a hundred years, scientists struggled with the riddle: why in some cases the transfusion acts as a magical revitalizing agent, while in others it leads to an almost instantaneous death.

The answer to this question was given by the Austrian and American physician, chemist, immunologist and infectious disease specialist Karl Landsteiner. In 1901, in the Austrian medical journal Wiener klinische Wochenschrift, he, then still an assistant at the Department of Pathology at the University of Vienna, published a scientific article “On the phenomena of agglutination of normal human blood.” In it, he spoke in detail about the presence of four blood groups in a person, as well as their compatibility. After that, blood transfusion ceased to depend on “luck”. Karl Landsteiner was awarded the Nobel Prize for his discovery in 1930. In relation to Landsteiner, scientists called it “bloody”.

So red, so different

There are four blood groups. And this is connected with the stages of human evolution. The most numerous and oldest group is 0, or the first. It is associated with the appearance of the first people with the same blood type. When people began to move from a gathering to an agrarian lifestyle in the period 25,000-15,000 BC, people began to consume more dairy products, as well as plant foods grown by themselves. Thus, the second group, or A, stood out. The third, or group B, appeared between 15,000 and 10,000 BC. It is connected with the migration of races from the African continent to Europe, Asia, and America. Finally, after mixing all three groups, the AB group, or fourth, appeared.

Of course, the composition of each blood group has its own differences, which, modern scientists are sure, determine the physiological and psychological characteristics of a person. In the body of the owners of the second blood type, more cortisol is produced – a hormone that protects us from stress. Sarah Gottfried, a functional medicine specialist and author of The Hormone Reset Diet, considers cortisol to be the “control system” for other hormones. As the doctor explains, cortisol does nothing for nothing: if it raises blood pressure, then only when it is simply necessary for the body. The same is true for blood glucose levels.

Cortisol regulates the immune system. Its concentration in the blood is subject to a special pattern, which scientists call the “cortisol curve”. In the morning, the concentration of this hormone is high, and before going to bed, it drops to a minimum. But an excess of this hormone in people with the second blood group manifests itself as a lightning-fast reaction to stress. As a result, people with type A blood are in a state of chronic stress. And this already leads to exhaustion of the adrenal glands. “High levels of cortisol cause damage over time, decreasing brain stores of happiness hormones like serotonin, causing sleep deprivation and fat storage, especially in the belly area,” says Sarah Gottfried.

This fact determines the second feature of people with the second blood group: they quickly gain weight and it is more difficult for them than others to lose weight, and the “hanging belly” is practically their calling card. There is another scientific explanation for this. Since the second group arose in the course of human adaptation to carbohydrate foods, its owners have a reduced acid content in gastric juice, but they have a higher level of disaccharides in their intestines. This contributes to the complete absorption and digestion of carbohydrates, but greatly inhibits the absorption of proteins and fats.

Meanwhile, the lack of work of the adrenal glands leads to another feature of people with the second blood group. The American psychologist R. Morse published data from doctors in the United States and Japan, according to which, of all patients suffering from alcoholism, almost half have blood type A. Scientists suggest that malfunctions in the adrenal glands lead to a feeling of lack of glucose in the blood. People subconsciously compensate for this deficiency by drinking alcohol. And if you consider that it is alcohol that most easily relieves stress, then, relaxing in this way regularly, a person becomes an alcoholic.

One more feature. People with blood type A, compared with others, are 20 percent more likely to suffer from stomach cancer. Scientists at the Dana Farber Cancer Institute, a center for cancer treatment and research in Boston, Massachusetts, USA, conducted experiments on animals with different blood types. They inoculated them with cancer cells and then observed how the body would react. It turned out that resistance depended on many factors. The blood type among them was one of the most important. When the research continued as observations of sick people, the patterns identified during the experiment by blood types were confirmed. In particular, people with II blood group had good immunity. Among them, a considerable percentage of centenarians. But when it comes to oncology, people with this blood type are more likely to get acute leukemia and stomach cancer. Japanese scientists who conducted similar studies say that it is more important for people with the second blood group than for others to have quality rest to maintain health.

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