Some people's gray hairs can naturally turn back to their original color, and this can happen to anyone — no matter their age, gender, or where the hair is on the body.

Going gray might happen because the stem cells that keep your hair colored aren't working properly as you age.

As mammals get older, their hair turns gray because the cells that give hair its color don't get replaced properly—and if their DNA gets too damaged, this process happens even faster.

If you reduce your stress, your gray hairs might actually grow back some of their color — meaning the cells that give hair its pigment aren't permanently dead once hair turns gray.

Going gray might happen because the stem cells that keep your hair colored stop working properly as you age, according to studies in people and specially tagged mice.

Going gray isn’t just about getting older — it’s because of damage from stress inside the hair roots, where too much hydrogen peroxide builds up and the body can’t fight it off anymore.