Dr. Garshick explains that when hair turns gray, also known as canities or achromotrichia, it is because of a loss of melanin, which can occur with aging and may be partly related to genetics or ...

"Premature greying of hair, also known as canities, occurs when hair turns grey before the age of 20 in Caucasians, 25 in Asians, and 30 in African-Americans," Dr Aparna Santhanam, a Mumbai-based ...