What are gray hairs? Gray hair is hair that has turned white or gray due to a loss of pigmentation. This discoloration of the hair is due to the decrease in specific melanin, which is what, among other things, determines the color of the hair. Research conducted in 2009 suggests that the appearance of gray hair is due to the absence of an enzyme (MSR) responsible for the reduction of hydrogen peroxide (hydrogen peroxide), therefore in the absence of this peroxide it compromises the functions of other enzymes, such as to prevent melanin produced. Types CanasDepending on when or how gray hair appears, four types of graying can be distinguished: physiological senescence or graying, is that produced by the natural aging of a person. The first area to be affected is the temples, followed by the back of the head (until fullness is reached). Premature graying: occurs before age 20 in Caucasians or before age 30 in blacks. It can occur due to various factors. In rare cases it can arise in childhood. Poliosis: it is a localized graying, i.e. it particularly affects the tufts of hair, eyebrows or eyelashes. This type of gray usually occurs due to a hereditary process. Some dermatologists consider poliosis premature graying. Annular graying: characterized by discontinuity, since the white hair usually appears loose and scattered on the head, but can also appear in groups or tufts. Causes - Why abandon the reed beds? causes CanasAs mentioned above, graying (loss of hair color) is produced by the reduction of melanin. But this reduction is due to several factors such as:1. The passage of time or natural aging. Aging is part of the destiny of human beings and the late or early graying of our genetics, so that as we grow older we will present the hood that enters... in the center of the card... the first gray hairs appear in the temples because the flow blood is reduced. To get the massage we can go to a spa, hire a person to do it or even do it ourselves. Avoid excessive heat: It is essential to pay attention when using electrical appliances such as irons, dryers or curling irons. In these cases it is best to use a heat protection product and limit its use (as well as avoiding setting the maximum temperature if it is adjustable). We cannot forget to protect ourselves from direct contact with the sun especially when we are on the beach or in hot areas, since ultraviolet rays can damage our scalp, so remember to use a sunscreen every time you go out. Another important factor is to heat the water in the tub, as very hot water can damage the hair follicles. d) Stop smoking. It has been shown that people who smoke are four times more likely to gray prematurely .