PRP for Hair Loss: What the Injections Can and Cannot Do

The honest answer: PRP for hair loss can help some people with pattern thinning a little, but the results are modest and vary a lot from person to person. It works best as an add-on to a plan your dermatologist sets, not as a stand-alone fix, and it isn’t the right tool for coin-shaped bald patches.

Salons, beauty parlours and clinics now advertise “PRP hair treatment” with pictures of thick, glossy hair, and people with thinning at the crown or a widening parting ask the obvious thing: does PRP work for hair loss, or is it an expensive hope? Here’s what the injections do, where they fit, and how to tell a careful clinic from a risky one. Find more guides in our Hair Care section.

How PRP works, explained like you’re 12

Your blood has tiny cells called platelets. Their main job is to plug cuts. But they also carry small signalling proteins (growth factors) that tell nearby tissue to repair itself.

In PRP, which stands for platelet-rich plasma, a small tube of blood is drawn from your arm and put into a machine that spins it very fast (a centrifuge), so that the heavy red cells sink to the bottom while a light, straw-coloured layer, thick with platelets, floats on top like cream on a pot of boiled milk. That layer is drawn off and injected with a fine needle into many small spots on the thinning scalp.

The idea is simple. Wake up tired, shrinking hair roots with a dose of the body’s own repair signals. The reality is messier. No two PRP preparations are exactly alike, because different machines, spin speeds and methods give different platelet levels, which is one reason results vary so much between clinics and between people.

What PRP can and cannot do for hair loss

For pattern hair loss in men and women, published trials are mostly small, use different methods, and give mixed results. The fair summary is that some people see a modest improvement, often a little thickening of existing hairs and less shedding that shows up in photos after several months, while others with much the same kind of thinning, the same number of sessions and the same clinic notice little change at all. That’s it. It is not a regrowth miracle.

PRP works on hairs that are still there, even if they’re thin and fine. A scalp that has been completely smooth for years has few living roots left to respond, and that’s why it’s usually offered earlier in thinning, and alongside other options your dermatologist chooses, such as those covered in our male pattern baldness options guide.

It also doesn’t fix hair loss with a different cause. Shedding after fever, childbirth, crash dieting or low iron usually settles once the trigger is fixed, as explained in girte baal and telogen effluvium. Paying for injections while ferritin is very low means paying for the wrong fix.

Myth: PRP is a permanent fix after a few sessions

Pattern hair loss is ongoing. Genes and hormones drive it, and they don’t switch off because of a course of injections, so any gain from PRP tends to fade over months if nothing else is done, which is why clinics talk about “maintenance sessions”. Ask about this at the start, so the full commitment is clear before you begin.

Did you know? The same platelet idea is used in sports medicine and in knee joints, where the evidence is also debated. Our look at knee injections including PRP shows the same pattern: some promise, lots of variation.

Why PRP is not for alopecia areata without a dermatologist

Coin-sized, smooth bald patches are usually alopecia areata, an immune problem where the body’s defence cells attack hair roots. Different disease. It can spread, affect eyebrows or beard, and sometimes links to thyroid problems or other immune conditions.

Some dermatologists have tried PRP in alopecia areata, but the standard options are different and need a proper diagnosis first, and walking into a parlour for PRP with a patch that hasn’t been checked can delay the right care. See our guide to the coin-sized bald patch for what it looks like and why home fixes don’t regrow it.

A typical PRP course, step by step

Clinics differ. Careful ones look like this.

1. Diagnosis first: a dermatologist looks at the scalp, often with a small magnifier (a dermoscope), asks about family history, illness, diet and periods, and may order blood tests for iron, thyroid and vitamin levels.
2. Baseline photos: taken in the same light and angle, so change can be judged fairly at 3 and 6 months.
3. Blood draw: usually a small tube, around 10 to 20 ml, from the arm.
4. Spinning: about 10 to 15 minutes in a centrifuge, using a sealed, single-use kit.
5. Injection: the scalp is cleaned with antiseptic, sometimes numbed, and small amounts are injected across the thinning area. It takes around 20 to 30 minutes.
6. Repeat: commonly a few sessions about a month apart, then a review before any top-ups.
7. Judge honestly: compare photos at around 6 months. If nothing has changed, it’s reasonable to stop spending and discuss other options.

Hygiene and who should perform it

PRP involves drawing blood and injecting it back, which means infection control is never a small detail, because in Pakistan and India unsafe needles and reused equipment are well-known routes for hepatitis B, hepatitis C and HIV. A clean result depends on these checks:

• A doctor, ideally a dermatologist, assesses you and is responsible for the procedure, whoever assists.
• The kit, tube and needles are opened in front of you, used once, and thrown away.
• Your tube is labelled and never leaves your sight; mixing samples is a real risk in busy clinics.
• The room is clean, gloves are fresh, and the scalp is disinfected properly.

A beauty parlour offering PRP with no doctor present is a clear no.

PRP hair treatment questions people ask