Canities - the natural process sooner or later happening to all. However someone begins to turn gray, having hardly reached youth, and someone lives up to fifty years in general without gray hair.
Canities are in many respects caused by the genetic reasons, but there are also other prerequisites, for example, food and stress. For most of people the defining factor is the genetics. The first the gray-haired lock at you will appear at the same age, as at your parents or grandmothers with grandfathers. However the rate of emergence of new gray hair also depends on way of life and habits of the person.
What aggravates emergence of gray hair
Smoking accelerates process of emergence of new gray hair. The anemia, bad food, lack of vitamins of group B and problem with thyroid gland can also promote premature decolorization of hair.
The pigment melanin is responsible for hair color in human body. It is the same pigment that paints skin in dark color at suntan. Each hair follicle contains cages which are called melanocytes. Those, in turn, make the painting pigments of black, brown, yellow and red color and also carry out melanin to cages which develop keratin - the main protein which is part of hair. At the very beginning of emergence of gray hair the melanocytes still are present at hair, but the hair color becomes lighter. Gradually these cages die out, and from saturated hair color there is no nothing left. Emergence of gray hair is inevitable process of aging. But sometimes the premature gray hair appears as a result of autoimmune disease. Some people begin to turn gray after 20 flyings, but at the same time they are quite healthy. The severe stress or shock can provoke fast emergence of large number of gray hair. As a rule, white people begin to turn gray after 30 flyings, Asians are closer by 40 years, and Africans after 40 flyings. According to researches, the age of emergence of the first gray hair in women becomes earlier. Now about 32 percent of women begin to turn gray, without having lived till 30 flyings. It means that, except genetic factors, hair are strongly influenced by stress. It is scientifically proved that during stress in organism vitamin B is destroyed, and its shortage promotes emergence of gray hair. The Japanese scientists claim that hair follicles react to stress just as DNA. It is so-called oxidizing stress, and it is caused by environmental pollution, smoking and ultra-violet radiation. Also between this type of stress and emotional stress there is some communication.
How to fight against gray hair
Now at persons interested young the choice to look small: to dye hair or to leave them as is, gray-haired. At the same time it is necessary to consider that gray hair hardly gives in to coloring due to the lack of melanin in them. Researchers from L'Oreal institute have opened the interesting fact. They have learned that skin cells and hair equally make melanocytes. But skin does not change color with age as hair. The reason for that absence in hair follicles of enzymes which are in skin cells. Scientists hope to develop medicine which could reproduce effect of enzymes that cells of hair kept color longer.