About one in five Americans use hair color, and most of them use it to conceal gray hair. Salt-and-pepper hair can often make many people look older than they feel. Graying can strike at any time, whether you are 29 or 49. It appears when the hair loses all the pigment that gives it color. Hence, artificial color is one of the most common, easy, and best solutions. However, it's important to remember that gray hair reacts differently to color, than normal hair, and hence, you should understand the process of selecting the best suitable dye.