when color-producing cells stop producing pigment in the hair, they turn grey/white. Or, due to certain chemical reactions inside our body, natural hydrogen peroxide builds up in the hair, bleaching the color of the hair. I suggst you should never pluck your white hair as it can damage the hair follicles, rather, cut your grey hair carefully. Or, if you feel embarrased, for social reasons, you can dye it with ammonia free color. There are many nutrient deficiencies, autoimmune syndromes and certain diseases which can cause premature graying of hair. I would like to know if you have been experimenting with your hair a lot in the sense of coloring, bleaching, straightening, or perming hair. I. E. If quite a lot of chemicals have been used on your hair. Or, if you have been taking medication for any ailment. If not, then, I would like to know if you are under some kind of mental or emotional stress. I suggest you to take a well balanced diet with added supplements if needed. Avoid fried food, pizzas, burgers, and pepsi, coke, diet drinks (all that is termed as'junk food') and even if it be tea, coffee or alcoholic bevereages.(good if you do not take these, but I have known young lads taking beer nd so.) #too much of everything retards hair growth and ages hair fast.
Get a blood test done to check the amounts of vitamins (esp. Vit b12), minerals (esp. Zinc and copper) and haemoglobin percentage.
Get your thyroid test done to see if body's metabolism is balanced or not.
Get rid of stress if any, by busying yourself in constructive activity as much as possible. Yoga and meditation can help. You can listen to the'sound of isha' on youtube.
Boost your mineral intake by taking organic green vegetables, sunflower seeds, flaxseeds, whole wheat /flour + bran, oats, barley, (jawar/bajra) etc.
Keep your body hydrated by intake of a good amount of fluid. This does not include soda, tea, coffee, alcoholic beverages, but rather fresh fruit juice, nariyal pani, nimbu pani, aam panna, etc. Oil your hair every once in a while to regulate the blood supply of hair follicles. Virgin coconut oil is the best. You can also massage your scalp with natural conditioners like amla juice and lemon juice. I can suggest you a lot more ways to avoid chemicals and get back your previos black hair by natural methods. For that lastly I suggest you to consult me in private.