Im 15 Years Old And Have Been Suffering From The

Im 15 years old and have been suffering from the problem of premature graying hair since last 5-6 years. I was in a boarding school for last 2 years and it has increased rapidly in those 2 years. Moreover, i had thick long hair before i went to dehradun. Since then, the quality of my hair has detiriorated and they have become extremely rough. Also, since last 3 months, im having A LOT of hairfall.
I recently went to a trilogist and he recommended me to use melnora gel, q sera black, and mildy shampoo. Is premature graying actually reversible? And how effective are these medications i have been recommended to use? REPLY SOON.