Over the course of a lifetime, human hair follicles slowly produces hydrogen peroxide. As the follicles age, our capacity to break down this bleach diminishes because we have been exposed to oxygen.
“Our bodies age the same way a photograph ages,” Dr . Gerald Weismann, a research professor of medicine at New York University and editor of FASEBJ, told FOXNews.com. “Hydrogen peroxide does to our hair — and the rest of our body — what sunlight does to photos and furniture that have been left out in the sun"...
“Chemistry is so well-understood that there are ways of overcoming (graying), by making chemicals to rub on their scalp,” Weissmann said. “That’s in the future.”