As you age you may start to notice gray hair. Each hair follicle contains a certain number of pigment cells. These pigment cells produce a continuous amount of melanin which gives the growing hair it’s color. As you get older the pigment cells in your hair shaft gradually die. When there are fewer pigment cells in each hair follicle, the strand of hair will no longer contain enough melanin to produce it’s natural color like brown or black, instead it will grow to be a transparent color like grey, silver or white.