How To Prevent Hair Loss?

hi doctor.......im divya 19 years.....im becoming bald.....i lost lot of hair in crown....my scalp in my crown become shiny.....i hardly find hair in the crown area now...i used morr3% solution first and later used trigaine.....but i lost lot of hair then......now my friends ask me to apply hair4u solution......pls suggest whether it is safe?????????