PRP for hair loss in London: what actually works, what it costs, and who it's for

PRP — platelet-rich plasma — is the most searched, most Instagrammed, and most inconsistently delivered hair loss treatment in London. Every clinic on Harley Street offers a version. Almost none of them offer the same protocol, the same concentration, or the same patient selection. That inconsistency is why patient results vary from transformative to near-zero.

This guide is written for one purpose: to help you spend £1,500–£3,000 on PRP once, correctly, rather than four times, badly. It draws on the current dermatology literature, the working protocols of five London hair restoration clinics, and the honest post-mortems of patients who did it wrong first.

What PRP actually is (and isn't)

PRP is a concentrate of your own platelets, spun down from a small draw of your own blood — typically 15–30ml — using a centrifuge. Platelets carry growth factors: PDGF, VEGF, EGF, IGF-1, TGF-β. Injected into the scalp at the level of the follicle bulge, these growth factors modulate the hair cycle: they push resting (telogen) follicles back into growth (anagen), extend anagen length, and modestly increase hair shaft diameter.

It is not a stem cell treatment. It is not exosome therapy. It is not a transplant. It cannot regrow follicles that have already fibrosed. And it is not, on its own, a substitute for minoxidil, finasteride, or a hair transplant when those are indicated. It is a follicle-signalling amplifier — powerful when the follicle is still alive, useless when it isn't.

Who PRP works for (the honest patient profile)

The strongest evidence, replicated across multiple randomised trials, is in early-to-moderate androgenetic alopecia — Norwood II–IV in men, Ludwig I–II in women. In this population, well-executed PRP produces measurable hair count increases of 15–30% at 6 months.

• Men, Norwood II–IV, still with visible vellus and miniaturised terminal hairs across the affected area.
• Women, Ludwig I–II, particularly around a widening central parting or thinning crown.
• Post-menopausal women with FPHL who cannot or will not tolerate topical minoxidil.
• Post-transplant patients using PRP to protect surrounding native hair from progressive miniaturisation.
• Patients on stable finasteride/dutasteride who have plateaued and want additional density.

Who PRP does not work for

PRP is inappropriate — and often actively wasted money — in the following presentations. A responsible London clinic will screen for these and turn you away.

• Scarring alopecias: lichen planopilaris, frontal fibrosing alopecia, central centrifugal cicatricial alopecia. The follicle is already destroyed.
• Advanced Norwood V–VII in men: not enough surviving follicles to amplify.
• Alopecia areata: this is autoimmune. PRP may modestly help but is not first-line — steroids and JAK inhibitors are.
• Active scalp inflammation, folliculitis, or seborrhoeic dermatitis flare — treat the scalp first.
• Patients on anticoagulants (warfarin, DOACs) without cardiologist sign-off.
• Pregnancy or breastfeeding — no safety data.
• Untreated iron deficiency or thyroid dysfunction — fix the systemic cause first, PRP after.

The protocol that actually works

The single biggest reason PRP fails in London clinics is under-dosing — either too few sessions, too low a platelet concentration, or too shallow an injection.

The protocol supported by the strongest evidence, and adopted by the more clinical London hair centres, looks like this:

• Induction phase: 3 sessions, 4 weeks apart. This is non-negotiable — single sessions do not produce lasting density.
• Booster: 1 session at month 4–5.
• Maintenance: 1 session every 4–6 months indefinitely, if you want to hold the gains.
• Injection depth: 1.5–2.5mm — targeting the dermal papilla and bulge region.
• Platelet concentration: minimum 4x baseline, ideally 5–7x. Below this, the growth factor dose is subtherapeutic.
• Injection density: ~0.05–0.1ml per point, spaced 1cm across the affected zone.

Single-spin vs double-spin vs PRF: what's the difference?

The centrifuge protocol determines what you're actually getting injected. Most Groupon-style clinics use a single-spin kit optimised for facial aesthetics — insufficient concentration for hair. Serious hair clinics use double-spin or true A-PRP systems.

• Single-spin PRP: 2–3x platelet concentration. Fine for skin, marginal for hair. Cheapest — often £250–£400.
• Double-spin PRP (A-PRP): 4–7x concentration, low white cell contamination. The current London standard — £450–£750.
• PRF (platelet-rich fibrin): no anticoagulant, slower release of growth factors, includes leucocytes and mesenchymal cells. Newer, promising, £500–£900.
• PRP + ACell (extracellular matrix): experimental, expensive (£800–£1,400), evidence marginal — most London clinics have quietly stopped offering it.

London 2026 pricing, honestly benchmarked

Prices below are for a single session; packages of 3 typically drop the per-session cost by 10–15%. Ranges reflect real quotes from clinics across W1, EC2, and SW1 as of Q1 2026.

• Entry-level single-spin PRP (mostly aesthetic clinics dabbling in hair): £250–£400.
• Double-spin A-PRP at a dedicated hair clinic: £450–£750.
• PRF or PRP with topical exosome/growth-factor combo: £600–£900.
• PRP bundled with microneedling (often the best-value combination): £550–£850.
• Package of 3 induction sessions: £1,200–£2,200 all-in.
• Ongoing maintenance session: £400–£650.

The London clinic pressure-test — 8 questions to ask

Bring these to every consultation. The answers separate serious hair clinics from aesthetic salons that added PRP to the menu.

• What centrifuge system and spin protocol do you use? (Look for named kit — Regen, Arthrex, Eclipse — and double-spin.)
• What platelet concentration are you targeting, and do you measure it? (Right answer: 4–7x, yes, with a QC print-out.)
• How many ml of blood do you draw, and how much PRP do you inject? (15–30ml draw, 5–8ml injected is normal.)
• What is your injection depth and grid density?
• How many sessions do you recommend and why? (Reject any single-session pitch.)
• What is your patient selection criteria — who do you turn away?
• Can you show me trichoscopy before/after images from your own patients, not manufacturer marketing?
• What is your position on combining with minoxidil, finasteride, or microneedling?

What PRP feels like — the honest walkthrough

A session takes 45–60 minutes end-to-end. Blood draw at the start (unpleasant if you dislike needles, otherwise fine). Fifteen minutes of centrifuging while you scroll. Topical anaesthetic cream sits on the scalp for 20 minutes. Injections themselves take 10–15 minutes and feel like small, sharp pricks — most patients rate discomfort 3–4/10.

The scalp is tender and slightly swollen for 12–24 hours. You may feel a mild pressure headache that evening. No shampoo for 12 hours; no gym, sauna or hair colour for 48 hours; no anti-inflammatories (ibuprofen, aspirin) for 3 days — they blunt the platelet response.

Timeline: what to expect month by month

• Weeks 1–4: nothing visible. You may notice a temporary increase in shedding at week 2–3. Do not panic — it means resting follicles are being pushed back into cycle.
• Month 2–3: shedding settles. Existing hair may feel thicker at the root.
• Month 4: measurable density change on trichoscopy in responders. Not always visible to the casual eye yet.
• Month 6–9: peak visible effect. Widened parting narrows; ponytail feels denser.
• Month 9–12: effect plateaus. Maintenance session due.
• Beyond: without maintenance, gains regress over 6–12 months. With maintenance, held indefinitely.

PRP alongside minoxidil, finasteride and microneedling

PRP is an amplifier, not a substitute. The current literature supports combining PRP with the following, in this order of evidence:

• Topical or oral minoxidil: strong synergy. Increases the density response by an additional 10–20% in most studies.
• Oral finasteride (men) or spironolactone (women): PRP + antiandrogen consistently outperforms either alone.
• Microneedling (1.0–1.5mm, weekly): mechanical stimulation appears to further amplify PRP by improving growth factor uptake.
• Low-level laser therapy (LLLT): modest additional effect, expensive per unit result — only if the budget allows.

Side effects and safety (what actually happens)

PRP uses your own blood, so systemic reactions are essentially nil. Local side effects are common but mild:

• Scalp tenderness and mild swelling — 24–48 hours.
• Small bruising at needle sites — resolves in 3–5 days.
• Temporary post-treatment shedding — a good sign, not a bad one.
• Rare: transient headache, dizziness at blood draw, superficial infection (<1% in reputable clinics).
• Not observed at meaningful rates: hair colour change, scarring, allergic reaction.

PRP for women — the important nuances

Female pattern hair loss responds well to PRP, but the workup is different. Any London clinic that injects PRP into a woman without checking ferritin, TSH, free T4, and androgen panel is skipping the diagnostic step — and diluting the results.

Post-menopausal women in particular often see excellent PRP response, especially combined with topical minoxidil 5% (yes, 5% — the 2% formulation is outdated). Perimenopausal women should have HRT considered as part of the picture.

PRP post-transplant — an underused indication

One of the smartest uses of PRP is protecting native hair around a transplant. A hair restoration surgeon in Marylebone put it plainly: 'We transplant the front, and the back keeps thinning. PRP holds the back.' A 3-session PRP course starting 3 months post-op, then annual maintenance, is now standard-of-care at more clinical London transplant practices.

Red flags — walk out if you see these

• Single-session pitches with dramatic before/after promises.
• Refusal to name the centrifuge kit or platelet concentration.
• PRP offered without a trichoscopy or medical history.
• 'PRP-lite' at aesthetic clinics for £150 — usually skin-grade concentration.
• Package deals bundling PRP with laser, mesotherapy and topical serums at a suspiciously round £2,000 — often a way to bury a weak PRP product inside an upsell.
• No follow-up trichoscopy at 3 or 6 months to measure results.

How PRP compares to the alternatives

PRP sits in the middle of the treatment ladder. Above it: hair transplantation, oral finasteride/dutasteride, low-dose oral minoxidil. Beside it: microneedling + minoxidil, mesotherapy. Below it: LLLT devices, topical peptides.

The honest comparison, for a Norwood III–IV man with £2,000 to spend and no medication on board, is not 'PRP vs finasteride' — it's 'start finasteride and topical minoxidil first, then layer PRP on at month 6 to accelerate visible density.'

The bottom line

PRP works, in the right patient, at the right concentration, in the right protocol, layered onto foundational medical therapy. That's a lot of conditionals — and every one of them fails somewhere in London every week.

If you cannot get straight answers to the eight questions above, don't book. The best PRP outcome in London costs less than the average PRP outcome, because the best clinics turn away patients they can't help.