PRP Therapy and Hair Transplants: What It Is, Whether It Works, and the Honest Evidence

PRP therapy uses a small amount of your own blood, spun down to concentrate the platelets to roughly 3 to 5 times their normal level, then injected into the scalp to support thinning follicles: the evidence that it helps is genuinely mixed, and it does not replace a hair transplant or the medicines that protect your hair¹. It is an add-on, sometimes a useful one, often an oversold one.

At my own consultation, PRP came up before the surgery did. It was offered as a paid add-on with a confident pitch about growth factors, and I remember asking the surgeon, fairly bluntly, whether it would actually change my result or just my bill. His answer was more honest than the brochure, and this article is the version of it I wish had been written down. For the bigger picture of how surgery and medicine fit together, start with the pillar on what a hair transplant is.

What is PRP therapy?

PRP (platelet-rich plasma) is made by drawing a small amount of your own blood, usually about 10 to 60 mL, and spinning it in a centrifuge to concentrate the platelets to roughly 3 to 5 times their baseline level before that plasma is injected into the thinning scalp¹. The idea is that platelets release growth factors, and delivering a concentrated dose to the scalp may support follicles that are still alive but shrinking.

It is worth being precise about what it is and is not. PRP is a treatment for follicles that still exist, not a way to grow hair from bare skin. It sits in the same family of options as topical and oral medicine rather than in the family of surgery, which is why it belongs in the conversation about hair transplant vs medication rather than being an alternative to the operation itself².

Does PRP work for hair loss?

The honest position is that PRP may give a modest improvement in hair density, and the evidence for it is only low to moderate quality². A number of small randomised studies, typically running a course of about 3 injection sessions, have reported measurable gains in hair count, while others have shown little difference, and the way each clinic prepares the plasma varies so widely that comparing results is difficult.

This is the part clinics tend to smooth over. PRP is not an approved, standardised drug with a dossier behind it the way finasteride and minoxidil are; it is a procedure whose recipe changes from one clinic to the next³. That does not make it worthless, but it does mean any single before-and-after photo tells you almost nothing about what it will do for you.

How PRP is used around a hair transplant

Some clinics offer PRP around the time of surgery on the theory that the growth factors may support the newly placed grafts and speed early regrowth, but graft survival is already commonly about 85 to 95% in skilled hands, so any added benefit is small and hard to prove³. The number PRP would have to improve is already high, which is exactly why a clear effect is so difficult to demonstrate.

What actually determines whether your grafts take is well established, and it is not an injection. It is how gently the follicles are handled, how briefly they sit outside the body, and how well the recipient sites are made. Those are properties of the surgical team, and they are covered honestly in hair transplant results. PRP, if it helps at all, is a modest tailwind on top of work that was either done well or was not.

What a PRP session involves

A PRP session usually takes about 30 to 60 minutes, and a starting course is commonly about 3 sessions spaced 4 to 6 weeks apart, followed by maintenance injections every 4 to 6 months¹. Blood is drawn from your arm, spun in a centrifuge, and the concentrated plasma is injected across the thinning zones with fine needles, often with a cold pack or numbing to take the edge off.

Because it uses your own blood, there is no risk of reacting to a foreign substance, and the common after-effects are minor: some tenderness, a little redness, occasionally mild swelling for a day. The catch is the schedule. This is not a one-off; the maintenance sessions are the real commitment, and dropping them means any benefit fades. That ongoing nature is the single most important thing to understand before you sign up.

PRP versus medication and surgery

PRP does not stop the hormone driving male pattern loss, whereas finasteride lowers scalp DHT by about 70%, which is why PRP is positioned as a support rather than a foundation⁴. A transplant redistributes DHT-resistant hair, medicine protects the native hair that is still thinning, and PRP, at best, gives the surviving follicles a nudge. They do different jobs, and the serious plans combine tools rather than betting everything on one.

The mistake I nearly made was treating PRP as if it were on the same tier as the medicine. It is not. If the goal is to keep your native hair from receding around a new hairline, the established tools for that are covered in hair transplant vs medication, and PRP is a maybe-helpful extra alongside them, not a swap for them².

Cost, maintenance and the honest verdict

PRP is not permanent and cannot cure pattern loss, so it needs repeating indefinitely to hold any benefit, and that ongoing cost is the part most worth weighing before you commit⁵. With maintenance every 4 to 6 months, a modest and unproven benefit turns into a recurring bill, which is a very different proposition from a one-time add-on.

My own decision, in the end, was to spend my money on the surgery and the medicine that has real evidence behind it, and to treat PRP as optional rather than essential. That was my call for my case, not advice for yours. What I would say to anyone being offered it is to ask the surgeon plainly what they expect it to change and whether the same money is better spent elsewhere, the way you would interrogate any add-on. It is not a scam, but it is also not the part of the plan that decides your result.