PRP for Hair Loss: What 12 Clinical Trials Actually Show in 2026

Platelet-rich plasma therapy is one of the most marketed and most debated treatments in hair restoration. It's offered at clinics for $500–$3,000 per session. The evidence is more nuanced than either the clinic brochures or the skeptics suggest. Here's an honest reading of where PRP actually stands in 2026.

01What PRP is

PRP involves drawing a small amount of blood, spinning it in a centrifuge to concentrate the platelets, and injecting the platelet-rich plasma into the scalp. Platelets contain growth factors (PDGF, VEGF, IGF-1, EGF) that promote cell growth and angiogenesis — the formation of new blood vessels. The theory is that delivering these growth factors directly to the follicle environment supports hair growth.

02What the clinical evidence shows

A 2024 meta-analysis of 12 randomized controlled trials found PRP produced statistically significant improvements in hair density, hair count, and shaft diameter compared to placebo. Effect size: moderate (SMD around 0.59). A 2025 meta-analysis pooling 43 trials and 1,877 patients found PRP significantly improves density with an average gain of +25.61 hairs per cm².

03Where it fits

PRP is most evidence-supported as an adjunct to, not a replacement for, standard AGA therapy. Its strongest evidence is as a combination with minoxidil or alongside hair transplantation (improving graft survival). As a standalone treatment for AGA, the effect is real but modest compared to finasteride + minoxidil.

Cost-effectiveness is the limiting factor: $1,500–$3,000 per treatment course, with maintenance sessions required. Finasteride and minoxidil achieve superior outcomes in head-to-head data at a fraction of the cost. PRP makes more sense as an add-on for people who've optimized the medication baseline and want additional tools.