The medical term for hair graying is canities. Hair turns gray (or white) when your hair follicles stop creating melanin. Melanin is the substance that gives your skin and hair color.
Some individuals experience premature graying of hair. Several factors can contribute to this, including vitamin deficiencies. Vitamin B12 deficiency can cause premature graying.
Premature graying of hair has become a common concern for many people today. While gray hair is often associated with aging it can appear unexpectedly in younger individuals. This raises the question ...