Will Ferrous Ascorbate And Folic Acid Effectively Restore My Thinning Hair, And How Long Will It Take To See Results?

hi..i m having very low hair density. my scalp is also slightly visible along with hair thinning and hair fall. my dermatologist has prescribed me ferrous abscorbate and folic acid tablet. is it effective and can you tell how much time will it take to get back dense and long hair