PRP for Hair Loss in NZ: Does the Evidence Actually Stack Up?

PRP (platelet-rich plasma) is everywhere in NZ aesthetic clinics for hair loss. The pitch sounds compelling: extract your own blood, spin it to concentrate the growth factors, inject it into the scalp, watch your hair come back. Natural. Your own cells. No drugs.

The reality is more nuanced. PRP can help — but only specific patients, only as part of a complete plan, and rarely justifies its price tag as a standalone treatment.

Here's the honest version.

What PRP actually is

A small volume of your blood (10–20 mL) is drawn from your arm and spun in a centrifuge. The spin separates blood components by density. The fraction enriched in platelets is then injected into the scalp at the level of the hair follicles.

The theory: platelets release growth factors (PDGF, VEGF, TGF-β, IGF-1) that stimulate hair follicle stem cells and improve local blood supply. Whether this translates into meaningful hair regrowth in real patients is where the evidence gets interesting.

What the evidence actually shows

The literature on PRP for androgenetic alopecia includes some genuinely positive trials and a lot of methodologically weak studies. Honest summary of the strongest evidence:

• Mild to moderate androgenetic alopecia: modest improvement in hair density compared to placebo, particularly in men still in early-stage loss (Norwood 2–4).
• Advanced loss (Norwood 5+): little to no meaningful effect. You can't bring back dead follicles with growth factors.
• Combination with minoxidil and/or finasteride: better outcomes than PRP alone. The medical foundation does the heavy lifting; PRP adds incremental benefit.
• Female pattern hair loss: smaller evidence base but generally positive results in early-stage cases.

Critical caveat: PRP protocols vary enormously between clinics — different preparation methods, different injection patterns, different session counts. Outcomes vary as much. There's no single "standard" PRP.

What PRP isn't

• Not a hair-regrowth miracle. You won't see dramatic before-and-after photos that aren't either (a) cherry-picked, (b) combined with finasteride and minoxidil, or (c) photographed under flattering hair-styling.
• Not a permanent solution. Whatever benefit you get fades over months. Maintenance sessions are required.
• Not a substitute for medical therapy. If you're not on finasteride/dutasteride or minoxidil, PRP alone is buying expensive incremental improvement when the larger fix is cheap and proven.

Realistic outcomes

Most men who do a standard course (3 sessions, 4–6 weeks apart, then maintenance every 3–6 months) and stay on medical therapy report:

• Slightly thicker existing hair
• Slowed further loss
• Sometimes a few new fine hairs in previously thinning areas
• Subjective "scalp feels healthier"

What they don't typically report:

• Filling in completely bald areas
• Looking like they did at 25 again
• Dramatic photo-worthy transformation

If a clinic shows you photos that look transformational, ask specifically: was this PRP alone, or PRP + finasteride + minoxidil + hair transplant + lighting + good camera angle? Reality is usually the second.

Cost in NZ

PRP is a private aesthetic procedure — not Pharmac-funded, charged per session by the clinic providing it, and pricing varies widely. A standard initial course is multiple sessions plus ongoing maintenance every few months indefinitely. PRF (platelet-rich fibrin, a newer variant) is usually a bit more expensive again.

That spend is worth weighing against what the alternatives are actually supported by. In the published evidence, the medicines used for male pattern hair loss carry considerably more weight than PRP does, which is studied as an add-on rather than as the main intervention.

Who PRP actually makes sense for

Yes, consider PRP if:

• You've been on finasteride and minoxidil consistently for 12 months and you've stabilised but want more
• You can't tolerate finasteride (sexual side effects, mood) and want a non-medical adjunct alongside minoxidil
• You're early-stage (Norwood 2–4) and want to maximise outcome ahead of considering surgery

Probably skip PRP if:

• You're not on any medical therapy yet — start there first
• You're Norwood 5 or above — diminishing returns
• Budget is tight — medical therapy is dramatically better cost-effectiveness
• You're hoping it'll replace medication — it won't

PRP vs PRF (platelet-rich fibrin)

PRF is a newer variant that produces a denser fibrin matrix and may release growth factors more slowly. Evidence base is smaller but increasing. Some NZ clinics offer PRF as a premium option at higher cost. Whether the extra spend translates into better outcomes is unsettled.

If you're going to do platelet therapy, the protocol matters more than the variant. A reputable clinic with a documented protocol and outcome tracking is the right thing to look for.

What questions to ask before booking

1. What preparation system do you use? (Single-spin, double-spin, kit type)
2. How many sessions and what interval?
3. What's the expected benefit and how do you measure it?
4. What happens if I don't get the benefit at 6 months?
5. Are you combining with medical therapy?
6. Maintenance protocol after the initial course?

If a clinic can't answer these clearly, they're selling a service without a protocol.

The honest recommendation

For most NZ men with male pattern hair loss, the smart sequence is:

1. Discuss the medical options with a doctor first. They're the better-evidenced part of any hair-loss plan, and whether any of them suits you needs an individual assessment. Anything you do start needs a consistent 12-month trial before the result means anything.
2. Reassess at 12 months. If you've stabilised but want incremental improvement, PRP becomes a reasonable add-on.
3. If you're planning a hair transplant, ask the clinic whether it uses PRP alongside surgery, and what evidence it relies on.
4. Don't pay for PRP as a substitute for medical therapy. It's not a substitute and the cost difference is enormous.

PRP is a real tool with real (modest) evidence. It's not a scam. It's also not the headline solution most clinics market it as.

Sources cited:

• DermNet NZ — Platelet-rich plasma for hair loss
• BPAC NZ — Male pattern hair loss
• Gupta & Carviel — JEADV systematic review on PRP for androgenetic alopecia (2017)
• AAD — Hair loss treatment guidelines

This article is general information, not medical advice. Discuss your individual situation with a medical professional before committing to any treatment.