Our skin contains a type of cell called melanocyte , which produces melanin. People who produce less melanin have a whiter complexion and those who produce more melanin turn black. The same can be said for hair. If for some reason the melanocyte cells at the base of the hair become inactive and the production of melanin stops, the result is a white hair color which we call hair maturation. It can happen at any age. Now the question may arise , why melanocyte cells are inactive, research has shown that this problem occurs in many people due to hereditary reasons . In some people who lose their hair at an early age, melanocyte cells become inactive due to autoimmune diseases. As a result, melanin does not reach the hair. This autoimmune disease causes the skin to produce anti-melanocyte antibodies against melanocytes , which destroy the melanocyte cells . One thing to keep in mind is that hair loss at a young age or at an older age does not happen suddenly. It can be seen that at first some of the hair starts to curl , then gradually it turns into other hair.