Premature greying is one of the main problem of modern lifestyle. Those dreaded streaks of silver and white pop in our early age even when we are in our 18 or 20s.
The first thing what you have to do is learn to eat right. Yes! right eating may change your hair colour. Eat Lots of greens, grains, flaxseeds, carrots, fresh fruits and veggies and yogurt.
Market products are chemical based products. Once we get blackish hair, but later our hair starts to become white and damages, and starts hair fall too.