It turns out that a man who has no friends subject his health to great risks. Scientists believe that living without friends is more dangerous than smoking, reports the Informing. As a result of a number of studies, Harvard researchers came to conclusion that loneliness is a source of a large number of diseases. In addition, the lack of close friends and relatives can bring to a premature death .

According to the scientists, the lonely people have a high level of colorless fibrinogen protein, which is dangerous to life, since it is responsible for the final stage of blood clotting and cessation of bleeding. The protein level can be reduced by means of contacting with friends and relatives.

The test results revealed that the level of fibrinogen was 20% higher in the blood of lonely people than in the rest of the study participants. It is explained by the fact that the lack of friends causes stress, which makes the level of fibrinogen increase . The researchers note that a high level of fibrinogen is observed among smokers .