This eventually results in the overproduction of hydrogen peroxide, which inhibits melanin formation. As a result, the pigment in the hair is reduced. Green emphasizes that while graying is usually always the product of natural aging, there is no way to totally prevent it. There are two types of gray hair: white and brownish black. White hair appears because there are fewer pigment cells in the skin around the scalp. Thus, there is less color in the hair. With age, these colorless hairs will be taken away from their surrounding skin and die. This is why gray hair is often more visible on older people. Brownish black gray hair results from changes to the melanin in the hair. As we have seen, this is done by enzymes in the body so there is no way to stop them from doing their job. However, scientists have found ways to reduce the amount of black hair that grows out of its follicle. These methods include using drugs like hydroquinone and tretinoin (Vitamin A) and radiation therapy for cancer patients. So, there is no cure for gray hair but there are ways to make it less obvious. Keep reading for more information!