11/25/2017 0 Comments Why does hair turn gray?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 have age-related graying. However, sometimes graying hair indicates an illness, especially if it occurs at a particularly young age. Health problems that may be heralded by gray hair include:
Some research also links premature graying to heart disease and low bone mass (called osteopenia, a precursor of osteoporosis). How these conditions relate to hair graying is unclear. Cigarette smoking can also cause premature graying. The bottom line When and how thoroughly your hair turns gray is influenced mostly by the genes you inherit from your parents. Though stress may play a role in the process, it would be more helpful to look to past generations rather than your current stress levels to help you predict when or if you’ll go gray. That’s true whether you’re the President of the United States, or someone with a less stressful job. This article first appeared on Harvard Health Publishing Hair by Brian - The Beauty Blog
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