The color of your hair depends on the pigment cells that are located at the base of each hair follicle. With age, these pigment cells die and their efficiency reduces. When the body stops producing pigments, hair starts becoming colorless, turning white. However, you can prevent gray hair by nourishing your scalp and protecting the base of your hair follicles. If your base and pigment cells are healthier, then you’ll be able to avoid gray hair much longer.