PRP (Platelet-Rich-Plasma) therapy for hair loss is a three-step process medical treatment in which the patients blood is drawn, processed and than injected into the scalp. PRP has shown a great deal of promises in the field of hair loss, and when injected promotes hair growth. PRP injections are done in a series of 4 sessions about 1-2 months apart. Results are not expected immediately, and maintenance treatments are recommended.