PRP (platelet-rich plasma) is a procedure in which a sample of your own blood is drawn, spun in a centrifuge to concentrate the platelet-rich plasma fraction, and then injected into the scalp. It is based on the idea that growth factors contained in platelets stimulate follicles to increase hair thickness and density. Its evidence tier is promising but somewhat uncertain (B/C) and off-label: several small randomized trials have reported positive gains in hair count and density.
The biggest limitation of PRP, however, is that the technique is not standardized. The spin protocol, number of sessions, and whether the platelets are activated vary considerably between clinics, which makes results inconsistent. In other words, a report that it worked for some people does not guarantee the same effect for everyone.
In practical terms, PRP carries a low allergy risk because it uses your own blood, but it requires repeat sessions to maintain any effect, and those costs add up. It's therefore best approached as a complement to proven drug therapy rather than a replacement, with the clinic's protocol and realistic expectations confirmed before you start.
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FAQ
Does PRP actually work?
Several small studies report positive gains in hair count and density, but because the technique isn't standardized, results are inconsistent. A benefit in some people doesn't guarantee the same for everyone, so it's more realistic to view PRP as a complement to proven medications rather than a replacement.
How many sessions do I need, and how long does it last?
PRP requires repeat sessions to maintain any effect, and the recommended number and spacing vary by clinic. A single session is unlikely to give a permanent result, and the costs accumulate. Confirm the clinic's protocol, maintenance plan, and cost before you start.
Is it safe? Are there side effects?
Because it uses your own blood, the risk of allergy or rejection is low. Still, as an injection procedure it can cause pain or swelling at the injection site and, rarely, infection. Having it done hygienically by experienced clinicians matters, and you should mention any underlying conditions beforehand.
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⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child