It depends. Face- super quick results as it aids in healing time. I often combine this treatment with energy based micro needling devices such as INFINI or straight forward Dermapen.For the scalp - the aim in androgenetic alopecia is to slow down the process, excess hair growth, in my opinion can be considered a bonus. Males need 2 treatments as a primer, the one PRP every 6 months. All the bestDr Davin Lim Laser DermatologistBrisbane, Australia.