I am 27 years old and am witnessing my hair turn white very steadily in last 12 months. Prior to this, I did not have any white hair and I know this for sure because I keep my hair very short and can see every single of my white hair ! What should I do ? Also, is their any other way (than dyeing) to make them black again considering my age. I live in the state of Uttar Pradesh near Delhi, regularly work out and have healthy food habits. Thanks !