Does PRP work for hair loss?

Of all the uses of PRP therapy, hair loss is where the evidence is most encouraging, and also where expectations most often run ahead of reality. For early androgenetic thinning, a course of scalp PRP injections can measurably increase hair density and thickness in a meaningful share of patients.

The mechanism makes sense. The growth factors in platelet-rich plasma appear to extend the active growth phase of the follicle and improve the blood supply around it, waking up follicles that are miniaturizing but not yet dead. That last clause is the whole story: PRP can revive struggling follicles, but it cannot create new ones where the follicle is gone. A scalp that has been bald and shiny for years has little for PRP to act on; a crown that is thinning but still has fine hair is the ideal target.

The practical reality is a series of monthly sessions, usually three to four to start, then maintenance every few months, because the effect fades without upkeep. Results are best when PRP is paired with proven treatments like minoxidil or finasteride rather than used as a standalone replacement. Anyone promising a permanent one-time fix for hair loss with PRP is overselling it. Treated as an add-on that buys density and slows the slide, with realistic, maintained expectations, it is one of PRP's more defensible uses. For the same reasons, it works far better the earlier you start. If you are weighing it against in-office facial treatments, our piece on PRP microneedling for skin covers the cosmetic cousin of this procedure.

Related reading: PRP versus the alternatives: when it is the right call.

Further reading: Efficacy of Platelet-Rich Plasma as an Adjunct to Hair Transplantation: A Systematic Review (Cureus 2025); Platelet Rich Plasma Hybridized Adipose Transplant (PHAT) for the Treatment of Hair Loss: A Case Series (Aesthetic Plast Surg 2021); Platelet-rich plasma for androgenetic alopecia: Does it work? Evidence from meta analysis (J Cosmet Dermatol 2017).