i am 21 years old but almost 25%of my hair has turned white already..i know the reason is hereditary but isn t there anything i can do to stop this premature whitening of hair??...also i have so many pimples marks on my face and my doctor have recommended me to take azithral 250mg for three times a week and to use retiderm along with dermamoist lotion in 1:3 ratio at night ...will this help me to get ride of those scars??