The hair color depends on different factors. Long ago it is noticed that it can change. But change of color does not depend on length of hair, their color is influenced by melanin pigment level, the it is higher, the hair are more dark.
Pigmentation of hair
Melanin is responsible for intensity of color, and saturation depends on amount of air in the pigment. There are two pigments which are responsible for hair color is eumelanin and feomelanin. Eumelanin is black-brown colors. This pigment consists of the extended granules. Feomelanin is responsible for yellow-red colors, consists of round and oval granules. In combination they give certain scale of color which depends on genetic factor. Most of all pigments contain in the center of hair, and in cuticle of hair there are almost no pigments.
If the hair contains eumelanina, then hair dark more. If, on the contrary, feomelanin prevails, then hair have reddish shades. And when the maintenance of two pigments not really big, hair have light tone.
Primary colors of hair are blond, fair-haired, red, brown and black. In total there are about 56 shades of hair.
Because of what the hair color can change?
Quite often at children at the age of 2 flyings the hair color changes. Hair gain final color usually by 5 years. But in certain cases it occurs during puberty. During this period the hair can darken because of receipt in testosterone organism. Aged from 20 till 30 flyings the hair can begin to lose pigmentation, the amount of the produced melanin decreases, large number of air bubbles is formed that leads to emergence of gray hair. This process at roots begins, at first hair become gray, and over time completely white. At what age the gray hair will begin to appear, depends on genetic predisposition of the person. Emergence of gray hair can be prevented. For this purpose it is necessary to eat, lead properly healthy lifestyle, to use hair care products. The hair color can also change under the influence of external factors which provoke failure in production of melanin. For example, because of stress or the shortage of nutrients.
Diseases which affect hair color
There are diseases which affect hair color, for example, albinism, vitiligo, Verner's syndrome. Albinism is genetic anomaly at which hair, eyes and skin contain very low quantity of pigment. At albinos very pale skin and hair, and eyes have grayish color. Vitiligo – disease during which hair and skin lose color. The disease can develop because of autoimmune diseases. Verner's syndrome can cause premature canities.