There are many old people have gray hair. Many of them only know that their hair become gray because of their age. They do not know the exact cause that makes their hair become gray. These days, not only old people who have gray hair but also there are many young people who have had gray hair. Actually, hair will become gray because the body is lack of the melanin or the follicle is not able to add the color to the hair. Melanin has the function to give color to the hair. Because the body is lack of the melanin, the hair will become gray.
The gray hair usually happens when people become old. Today, there are many young people also have gray hair. There are some causes that can make hair become gray. The first cause is having tension and stress. People who has much tension and stress will have gray hair earlier than people who has less tension and stress. Smoking is the other cause of gray hair. People who often smoke have the high level to have the gray hair early. Smoking is very dangerous for our health so that it can also be dangerous for our hair. Besides, some illness and drugs also can make people have the gray hair early.