I hav grey hairs. how can i get back black hairs..

Hair dye: Sorry, but once graying of hair starts, there is nothing known to reverse it. If very few gray hairs, you might be able to just pull them -- but before long there probably will be too many for this to be practical, and hair dye will be your only option.

Might not be able to: First thing to know is that genetics plays the biggest role in early graying- we can't change our genetics. To reduce risks of early graying & hair loss: 1. Don't Smoke. 2. Correct Zinc, Vit B or other nutritional deficiencies. Vegans are at risk for Vit B12 deficiencies. 3. Ensure that your thyroid is healthy. 4. Diets> Eggs are rich in biotin. Dark greens are high in Vit A & C. Omega 3 fatty