Thanks for writing to us.
If you are below 30 years of age then this greying of hair is premature and is known as premature canities. If you are beyond 30 then its just a normal ageing process.
Premature canities can be genetic and it can be due to nutritional deficiency
, use of chemicals, stress
Treatment requires intake of tablets containing calcium pantothenate
or PABA. You may also apply melitane based product once in a day to prevent further greying. Melitane is a recently discovered promising peptide compound, helpful in preventino of the same. It also has the property of turning grey hair back to fully pigmented black hair.
hope that helped.