PRP vs Minoxidil: What the Science Says

When it comes to non-surgical hair loss treatment, two options dominate the conversation: Platelet-Rich Plasma (PRP) therapy and topical Minoxidil. Both have clinical evidence supporting their efficacy, but they work through entirely different mechanisms and suit different patient profiles.

Minoxidil (marketed as Rogaine/Regaine) is a topical vasodilator originally developed as a blood pressure medication. Applied to the scalp, it prolongs the anagen (growth) phase of the hair cycle and increases blood flow to the follicles. Clinical trials show that approximately 40–60% of users experience some degree of hair regrowth, with the best results typically seen in the crown area.

PRP therapy takes a fundamentally different approach. By concentrating the growth factors naturally present in your blood and injecting them into the scalp, PRP stimulates cellular repair, increases blood supply to the follicle, and triggers new hair growth. A 2019 meta-analysis in Dermatologic Surgery found that PRP significantly increased both hair density and thickness compared to placebo.

The key differences matter. Minoxidil requires daily application indefinitely — stop using it, and any gains typically reverse within 3–6 months. It can cause scalp irritation, unwanted facial hair growth (particularly in women), and initial shedding. PRP, by contrast, requires sessions every 4–6 weeks initially, then maintenance every 4–6 months.

Recent comparative studies are particularly interesting. A 2021 study in the Journal of Cosmetic Dermatology found that PRP produced superior hair density improvements compared to Minoxidil at 6 months. Importantly, PRP showed fewer side effects and higher patient satisfaction scores.

At Hidden Clinic, we often find that the most effective approach isn't choosing one over the other — it's understanding which treatment (or combination) is right for your specific type and stage of hair loss. Our diagnostic-first approach ensures you're not guessing; you're making an evidence-based decision.