<s>[INST] Hello doctor, Most of my hair has turned white. I also have a white beard and white hairs in my mustache. Please prescribe best medicines to make all my hair totally black. I do not want to dye them as dye contains peroxide which will cause hair loss. So, please prescribe the best medicine to turn my hair on my head, beard, and mustache totally black. [/INST] Hello. Grey hairs are resistant to any kind of treatment and it might be due to either genetic or micronutrient deficiency. If it is due to micronutrient deficiency it can be controlled with the help of the following medication. Consult a specialist doctor, discuss with him or her and start using the medicines with their consent. For further queries consult a dermatologist online --> </s>