Sedation is a natural process, sooner or later occurring with everyone. However, someone starts to turn gray, having barely reached youth, and someone lives to fifty without any graying at all. Sedation is largely due to genetic causes, but there are other prerequisites, such as nutrition and stress.
For most people, the determining factor is genetics. The first gray strand you will appear at the same age as your parents or grandparents. However, the rate of appearance of new gray hair also depends on the lifestyle and habits of a person.
What exacerbates the appearance of gray hair
Smoking accelerates the process of appearance of new gray hair. Anemia, poor nutrition, a lack of B vitamins and thyroid problems can also contribute to premature hair discoloration.
For the hair color in the human body is pigment melanin. It is the same pigment that dyes the skin in a dark color when sunburned. Each hair follicle contains cells called melanocytes. Those, in turn, produce color pigments of black, brown, yellow and red color, and also carry melanin to cells that produce keratin, the main protein that is part of the hair.
At the very beginning of the appearance of gray hair, melanocytes are still present in the hair, but the color of the hair becomes lighter. Gradually these cells die out, and from the saturated color of hair there is nothing left.
The appearance of gray hair is the inevitable process of aging. But sometimes premature gray hair appears as a result of autoimmune disease. Some people start to turn gray already after 20 years, but at the same time they are quite healthy. Severe stress or shock can provoke the rapid appearance of a large amount of gray hair.
As a rule, white people begin to grow gray after 30 years, Asians closer to 40 years, and Africans after 40 years. According to studies, the age of appearance of the first gray hair in women becomes earlier. Currently, approximately 32 percent of women begin to grow gray, not live to 30 years. This suggests that, in addition to genetic factors, hair is strongly affected by stress. Scientifically proved that during stress in the body, vitamin B is destroyed, and its lack contributes to the appearance of gray hair.
Japanese scientists say that the hair follicles respond to stress in the same way as DNA. This is the so-called oxidative stress, and it causes pollution of the environment, smoking and ultraviolet radiation. There is also some connection between this kind of stress and emotional stress.
Как бороться с седыми волосами
At present, those who wish look young the choice is not great: dye your hair or leave it as it is, gray. It should be borne in mind that the gray hair is difficult to color due to the lack of melanin in them.
Researchers from the L'Oreal Institute have discovered an interesting fact. They learned that skin cells and hair produce melanocytes equally. But the skin does not change color with age as much as hair. The reason for this is the lack of enzymes in the hair follicles, which are in the skin cells. Scientists hope to develop a drug that could reproduce the effect of enzymes, so that hair cells retain color longer.