Sir when I met dermatologist for early white hairs at 17 age. He prescribed me 2 types of tablets also 1 gel and another one is lotion. Lotion suppose to applied at evening and a gel -placentrex gel at morning and he advised me to apply placentrex gel on hairs and scalp and expose to sunlight for 10 mins. What does it mean. What is the reason behind this? Plzz help me. And he suggest to apply clonate lotion on scalp at evening I want to know abut both gel and lotion case? Plzz hope you reply.