What causes grey hair?

What causes grey hair?

Marilyn Sherlock (Trichologist) gives expert video advice on: Can I prevent or slow down the production of grey hair?; Is grey hair a sign of aging?; Will I go bald quicker if I dye my hair? and more...

Grey hair is caused by a loss of pigment to the scalp. Pigment is produced by a substance called melanin which is dominant in youth but, as one gets older, there becomes less melanin in the skin. Therefore, the hair cannot take the pigment and becomes white or grey. Grey actually is a combination of the natural colour and white hair, giving the appearance of grey. It isn't actually a grey hair.