Why does hair turn grey?

Question: Why does hair turn grey?
- Keywords:
  age,
  grey,
  hair
Asked by to Del, John on 20 Mar 2014. This question was also asked by .
- John Foster answered on 20 Mar 2014:
  
  As you get older the pigment in your hair (called Melanin) stops being produced by your hair folicles. This causes the hair to lose its colour and it appears white or grey in the light.

Question: Why does hair turn grey?