Why does hair turn gray?

Follow me on Twitter @RobShmerling If you look at photos of President Obama taken before he ran for president and since he left office, you’ll notice a distinct difference: where there used to be only dark brown hair, there is now far more gray than brown. It seems that the stress of running a country would turn any person’s hair gray. But is stress really to blame? And why does hair turn gray, even for those of us who don’t have jobs quite as stressful as President of the United States? Stress doesn’t actually turn hair gray. In fact, hair doesn’t actually “turn” gray. Once a hair follicle produces hair, the color is set. If a single strand of hair starts out brown (or red or black or blond), it is never going to turn gray. Your hair follicles produce less color as they age, so when hair goes through its natural cycle of dying and being regenerated, it’s more likely to grow in as gray beginning after age 35. Genetics can play a role in when this starts. While being under stress can’t turn your hair gray, stress can trigger a common condition called telogen effluvium, which causes hair to shed at about three times faster than normal. The hair grows back, so the condition doesn’t cause balding. But if you’re middle-aged and your hair is falling out and regenerating more quickly because of stress, it’s possible that the hair that grows in will be gray instead of its original color. Illnesses that cause gray hair The vast majority of people with gray hair...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Health Healthy Aging Skin and Hair Care Source Type: blogs