PRP (platelet-enriched plasma) is an effective treatment for androgenetic alopecia. It is intended for men and women who want to stop their hair loss and restore their hair. PRP is a non-surgical treatment that stimulates hair growth, it is used to treat hair miniaturization. PRP injections have proven to be effective for many years in many surgical and medical specialities. PRP has been very successful in recent years for its application in hair loss and miniaturization treatment, as a full-fledged treatment or as part of a comprehensive hair restoration also including a hair transplant. Blood contains platelets that release growth factors. Growth factors trigger tissue regeneration mechanisms, which is why PRP is used in the field of hair restoration.