Did you know that when you hair turns gray is determined mainly by your genetics, but there are some things you can do to slow down the process. The main cause for graying hair is the slow down of pigment production called melanin. Your hair follicle contains pigments that are called melanocytes which produce eumelanin which is either black or dark brown. Phenomelanin is a reddish-yellow color. Both melanocytes and phenomelanin pass melanin to the cells which produce keratin. Keratin is the main protein in the hair shaft. When graying begins, melanocytes are still present but as you age they become less active and less pigment is deposited into the hair so it has a lighter look. Anemia, lack of vitamin B and even untreated thyroid conditions contribute to the graying process. Smoking can also increase the rate at which your hair turns gray. While extreme shock can cause hair to gray much more quickly, it is a myth that one can turn gray overnight. By eating healthy, monitoring your B vitamins, avoiding cigarettes and living a healthy lifestyle you can positively impact how quickly your hair grays.