PRP for Hair Loss and Thinning Hair 2026. Does It Actually Work for Hair Growth, and What the Evidence Really Shows
Thinning hair is far more common than people admit. Around 40% of women notice visible thinning by the age of 50, and many men see it earlier. The most common cause is androgenetic hair loss, where follicles shrink and each new strand grows back finer and shorter. A lot of hair loss, though, has a reversible cause that a blood test can find, such as low iron, thyroid problems or vitamin deficiency, and no serum or in-clinic treatment will fix those on its own. PRP, which stands for platelet-rich plasma, is one of the most studied in-clinic options for hair growth. The current evidence, from a 2025 review of 43 randomised trials and almost 1,900 people, shows moderate but real gains in hair density, with the best results in early-to-moderate hair loss and when PRP is combined with proven treatments. This guide explains why hair thins, what PRP is, what it can and cannot do, and how to get a plan that actually works.
Enquire about PRP for hair loss on WhatsApp or email team@thewellnesslondon.com. You can also call +44 20 3951 3429
If your parting looks wider than it used to, or your ponytail feels thinner in your hand, you are noticing something real. Female pattern hair loss affects roughly 40% of women by the age of 50, and fewer than half of all women reach 80 with a full head of hair. In men, the pattern often starts earlier.
Losing 50 to 100 hairs a day is completely normal. What matters is a lasting change, such as more shedding than usual, a widening parting, a scalp that shows through more, or strands that feel finer than they did a year ago. One heavy day in the shower is not a diagnosis.
Your hair grows in a cycle, and hair loss is that cycle going wrong
Every follicle moves through a repeating cycle, and most hair loss is a disruption of it.
Anagen is the active growth stage and can last for years. At any moment, about 90% of your hair is here.
Catagen is a short transition stage when growth slows and the follicle shrinks.
Telogen is the resting stage when the follicle is inactive.
Exogen is the shedding stage when the old hair naturally falls out and new growth begins.
When something cuts the growth stage short, or pushes too many follicles into resting and shedding at once, you see thinning. This is also why treatments take months to show, because you are working with a cycle that moves in seasons, not days.
The most common cause of hair loss is genetic
The leading driver of thinning in both men and women is androgenetic hair loss, also called male pattern baldness and female pattern hair loss. It does not make hair fall out overnight. Instead the affected follicles gradually shrink, a process called miniaturisation, so each new strand grows back finer and shorter than the last until the coverage is no longer there.
In men it usually shows as a receding hairline and thinning at the crown. In women it is more spread out, with a wider parting and less density across the top of the scalp.
A lot of hair loss is reversible, and this is the part people skip
Before you spend money on any treatment, get the full picture. A simple blood test can reveal reversible causes that no topical or in-clinic treatment will fix on its own.
Common triggers include hormonal shifts, such as after pregnancy or around the menopause. Low iron and low ferritin are frequent and often missed, especially in women. Thyroid problems, low vitamin D and low B12 can all thin hair. Stress and illness can trigger a sudden, heavy shed called telogen effluvium, which usually recovers once the trigger passes. Tight styling and repeated heat damage add to the problem over time.
If your thinning is being driven by low iron or an underactive thyroid, the fix is treating that, not layering on product after product while the real cause carries on. A proper diagnosis is what makes any plan work, and it is worth a conversation with a GP before you start.
What is PRP
PRP stands for platelet-rich plasma. The idea is simple. A small sample of your own blood is taken and spun in a centrifuge to concentrate the platelets. That concentrate is then injected into the scalp.
Platelets are full of growth factors, which are signals that appear to wake dormant follicles, extend the active growth stage and improve blood supply to the scalp. In other words, PRP does not add new hair. It works with your existing follicles to push them back towards healthier, longer growth cycles.
Because PRP uses your own blood, it has a good safety record. The main side effects are short-lived tenderness, redness or mild swelling where the injections go in.
Does PRP actually work for hair loss
This is the honest part, and it matters more than any before-and-after photo.
The strongest evidence to date is a 2025 systematic review and meta-analysis of 43 randomised controlled trials involving 1,877 people. It found moderate-quality evidence that PRP is safe and improves hair density, reduces shedding and leaves most people satisfied. Several earlier reviews reached the same conclusion, with some clinical studies reporting hair density gains of around 30 to 40%.
A few points are worth being clear about.
It helps density more than thickness. Studies show more hairs per area, but PRP did not reliably increase the thickness of each individual strand.
Activated PRP performed better. Trials suggest activated PRP works better and with fewer side effects than non-activated versions.
It works best early. The strongest results are in early-to-moderate hair loss, where follicles are shrinking but still alive. PRP cannot revive follicles that are already gone.
It works best as part of a plan. Reviews found PRP combined with minoxidil beat minoxidil on its own. PRP tends to add to proven treatments rather than replace them.
The evidence has limits. Researchers repeatedly flag that clinics prepare PRP in different ways and that some studies are small, so results can vary from one provider to another.
How PRP compares with the proven treatments
For genetic hair loss, the treatments with the longest track record are topical or oral minoxidil for both men and women, finasteride for men, and in some women a medicine called spironolactone. These are usually the first step, and they need to be taken consistently to keep working.
PRP sits alongside these rather than instead of them. The sensible approach for most people is to confirm the diagnosis, correct anything a blood test picks up, start a proven treatment, and add PRP to boost density and give dormant follicles a push. Used this way, PRP earns its place. Used as a standalone quick fix, it usually disappoints.
What to realistically expect from PRP
If a qualified clinician agrees PRP is a good fit, here is a clear picture of what you can expect.
You will usually start with a course of three to four sessions spaced a few weeks apart. First results tend to show at around three to six months, because hair grows slowly. Results are not permanent, because PRP does not change your genetics, so most people need a top-up session roughly every 12 to 18 months to hold their gains.
PRP for hair in London commonly costs a few hundred pounds per session, so a full initial course is a real investment, and it is not usually covered by insurance. Ask for the whole course to be quoted upfront rather than session by session. It is also worth correcting any iron or vitamin deficiency first, because a follicle that is short on raw materials responds less well to anything.
When thinning hair needs a doctor rather than a shampoo
See a GP or a dermatologist if the shedding is sudden or heavy, if you can see patches of bare scalp, if there is redness, scaling, itching or scarring, or if thinning comes with other symptoms such as tiredness, weight change or changes to your periods. Hair loss with scarring can become permanent if left, so it should be checked early. Sudden patchy loss can be a different condition called alopecia areata, which is treated differently again.
The honest bottom line
Thinning hair is common, it is rarely anything to be ashamed of, and it is often treatable. The order of events matters more than any single product.
First, get a diagnosis and a blood test to rule out reversible causes. Second, treat the root cause rather than only the symptom. Third, use evidence-based treatments together, with PRP added to proven options rather than used in place of them. Fourth, be patient, because meaningful change takes months, not weeks.
Your hair grows in seasons. The people who get the best results are the ones who find the real cause, start early and stay consistent.
Book a hair loss assessment on WhatsApp or email team@thewellnesslondon.com.
Frequently asked questions
Does PRP work for hair loss? The current evidence says yes, with moderate-quality proof that PRP improves hair density and reduces shedding, especially in early-to-moderate hair loss. It works best alongside proven treatments such as minoxidil rather than on its own.
How many PRP sessions do I need for hair? Most people start with a course of three to four sessions a few weeks apart, then a top-up session roughly every 12 to 18 months to keep the results.
When will I see results from PRP? First results usually appear at around three to six months, because hair grows slowly. Expect gradual change rather than an overnight difference.
Is PRP permanent? No. PRP does not change the genetics behind hair loss, so the gains fade without maintenance sessions.
Does PRP hurt, and is it safe? PRP uses your own blood, so it has a strong safety record. Most people feel only short-lived tenderness, redness or mild swelling at the injection sites.
PRP or minoxidil, which is better? They are not rivals. Studies show PRP combined with minoxidil works better than minoxidil alone, so many people use both.
What is the most common cause of thinning hair? Androgenetic hair loss, the genetic form, is the most common cause in both men and women. It shrinks follicles so each new strand grows back finer and shorter.
Can a blood test explain my hair loss? Often, yes. Low iron and ferritin, thyroid problems, low vitamin D and low B12 are common and treatable causes, which is why a blood test should come before any treatment.
How much does PRP for hair cost in London? It commonly runs to a few hundred pounds per session, with an initial course of three to four sessions. It is not usually covered by insurance, so ask for the full course price upfront.
Book a hair loss assessment in London
The Wellness provides doctor-led hair loss assessment, blood testing to find reversible causes, and PRP for hair growth as part of a proper plan rather than a standalone injection.
Enquire now on WhatsApp, email team@thewellnesslondon.com, or call +44 20 3951 3429.
References
DermNet. Female pattern hair loss. Updated 2024. NHS. Hair loss. Reviewed 2024. NICE. Clinical Knowledge Summaries. Androgenetic alopecia. Updated 2024. Systematic review and meta-analysis of platelet-rich plasma in the management of alopecia, 43 randomised controlled trials, Dermatology and Therapy, 2025. Meta-analysis of platelet-rich plasma combined with minoxidil for androgenetic alopecia, Aesthetic Plastic Surgery, 2024. Use of autologous platelet-rich plasma in androgenetic alopecia in women, Journal of Dermatological Treatment, 2023.