You may often see many old people have gray hair. When we are at the old age, there is a lack of pigment cells in the follicle of our hair. It is able to make the melanin become fewer so that the hair will be gray. Today, the gray hair not only happens on the old people but also on any ages. It can be seen there are people that are still young have the gray hair. There are some students at the college and, moreover, some high school students have the gray hair. It means that the gray hair is not only caused of the age factor.
There are some people who are still young that have the gray hair but their hair not completely become grew. Although their hair not completely becomes gray, it may be taken a few years to become completely gray. There are many people think that the gene is able to determine the gray hair at the early time. It means that people will have the gray hair at the same time with the time when their parents had the gray hair. However, the doctors do not justify that statement. The time when people get the gray hair is not determined by the gene