Platelet-rich plasma, usually shortened to PRP, may be the most heavily marketed hair treatment in India today. In clinic, I meet patients who have paid for three, four or six sessions and cannot tell whether anything changed, because nobody measured their hair before they started. That is not a failure of the patient. It is a gap in how the treatment is usually offered.
The honest position sits between the advertisements and the sceptics. PRP has real, measurable biological activity, and some randomised trials show benefit. The trials are also small, the protocols differ from one another, and several outcomes do not separate clearly from placebo. By the end of this article you should understand what PRP is, what it can plausibly do for androgenetic alopecia, what it cannot do, and how to judge whether it deserves a place in your plan.
The Science Behind PRP and Hair
PRP is made from your own blood. A sample is drawn, spun in a centrifuge to concentrate the platelets, and the platelet-rich layer is injected into the scalp. Platelets carry growth factors and signalling proteins that are involved in wound healing and in the hair follicle’s own growth cycle. The working idea is that delivering them near follicles may prolong the growth phase (anagen), improve the blood supply around the follicle, and help miniaturised follicles produce thicker hairs.
Note what this mechanism does not include. PRP does not block dihydrotestosterone (DHT), the hormone that drives pattern hair loss in genetically sensitive follicles. In androgenetic alopecia the underlying process continues while PRP is given. In practical terms, PRP can be understood as support for follicles that are still alive, not as a cure for the cause.
That distinction matters in the Indian context. Many men and women reach a clinic after months of shedding triggered by something reversible, such as low iron, thyroid disease or a crash diet, layered over an inherited pattern. If the trigger is not found and treated, an expensive injection course will be asked to compensate for a problem it was never designed to solve.
What Most People Get Wrong About PRP
In twenty years of practice, I see patients misled by four ideas again and again.
“PRP regrows hair that is already gone.” PRP acts on follicles that are still present but weakened. Where the scalp is completely smooth and shiny, with no visible follicular openings, there is little left for it to act on. This is why it is far more reasonable for early thinning than for advanced baldness.
“One session is enough.” The trials generally use a series of sessions spaced weeks apart, followed by maintenance. A single session is unlikely to give a result that can be told apart from natural fluctuation in shedding.
“All PRP is the same.” It is not. Kits, spin speeds, platelet concentration, whether an activator is used, injection depth and volume all differ between clinics. Reviewers repeatedly point to this lack of standardisation as the main reason results are hard to compare.
“If I stop finasteride, PRP can replace it.” There is no good evidence that PRP replaces DHT-targeting medication in men with active pattern loss. Stopping proven treatment in favour of an injection course is a decision to make only after a proper discussion with a doctor.
What the Evidence Actually Shows
A 2023 systematic review and meta-analysis in the Journal of Cutaneous Medicine and Surgery pooled nine randomised controlled trials with 238 patients with androgenetic alopecia. Hair density increased with PRP compared with placebo at both three and six months. Hair thickness and hair count improved compared with each patient’s own baseline, but the difference against placebo for those two outcomes was not statistically significant. Of the seven trials that reported safety, two noted mild adverse reactions, and no serious events were reported.
Read carefully, this is an encouraging but limited result. It supports the statement that PRP can improve hair density in some patients with androgenetic alopecia. It does not support the claim that it reliably thickens every strand, nor that it works equally well for everyone. The sample is small, follow-up is short, and the trials used different preparation methods, so a clinic’s own protocol may not match any of them.
There is also a quieter issue: we do not yet know how long benefit lasts after sessions stop. Most data cover months, not years. Anyone who promises a permanent result is going beyond the published evidence.
Practical Steps: What You Can Do
Before paying for a PRP course, take these steps.
First, get the diagnosis right. A trichologist should examine the scalp, ideally with magnified imaging, and ask about shedding pattern, family history, diet, recent illness and medication. Blood tests for ferritin, thyroid function, vitamin D and, where relevant, hormonal profile are sensible starting points. You can read more about causes and treatment choices in the guide to hair loss treatment in India and the overview of androgenetic alopecia.
Second, ask for a baseline. Standardised photographs taken in the same light and angle, and ideally a density measurement of a marked scalp area, let you and the clinician judge the result at three and six months instead of guessing.
Third, ask what protocol will be used: how many sessions, how far apart, and what the plan is if there is no measurable change by the sixth month. A reasonable clinician is comfortable defining a stopping point.
Fourth, treat PRP as one part of a plan. For most men with pattern loss, evidence-based medical therapy and correction of nutritional or thyroid problems come first. For those with stable, advanced loss, surgical options such as FUE hair transplantation are assessed on their own merits, and PRP is sometimes used around surgery to support healing. That use is common, but the evidence for it is less settled than for androgenetic alopecia alone.
When to See a Trichologist or Hair Surgeon
Seek a professional assessment, before any injection course, if shedding began suddenly and has lasted more than three months, if you see patches rather than diffuse thinning, if the scalp is itchy, painful, scaly or inflamed, or if you have other symptoms such as fatigue, weight change or irregular periods. Those patterns can point to conditions that need medical treatment first. Also seek advice if you have a blood disorder, are on blood thinners, or have an active scalp infection, because PRP may not be suitable for you. This is not a reason for alarm. It is simply the point where a specialist’s eyes save you time and money.
Frequently Asked Questions
Does PRP really work for hair loss?
It can improve hair density in some people with androgenetic alopecia, according to pooled randomised trials. The effect on hair thickness and count compared with placebo is less certain, and results vary between individuals.
How many PRP sessions are needed?
Trials typically use a series of sessions several weeks apart, followed by maintenance, but protocols are not standardised. Ask your clinician for a written plan and a review point.
Is PRP permanent?
No. Because the underlying hormonal sensitivity continues, benefit is expected to fade if treatment stops. Long-term data beyond a year or so are limited.
Is PRP painful or risky?
The injections cause scalp discomfort and sometimes temporary tenderness or swelling. Serious complications are uncommon in the published trials, but sterile technique and a properly trained operator matter.
Can PRP replace a hair transplant?
No. PRP may slow thinning or thicken weakened hairs, but it cannot rebuild a hairline that has already receded to bare skin. Transplantation addresses that situation.
Is PRP the same as the treatments shown on social media?
Not necessarily. Preparation methods and added products vary widely, and claims online often outrun the published evidence.
Conclusion
PRP is neither a miracle nor a gimmick. It is a modestly supported, biologically plausible treatment for early pattern thinning, and it works best when the diagnosis is right, the baseline is documented, and expectations are realistic. If you decide to try it, insist on measurement and a defined review point.
If you have questions about your specific situation, a trichologist or hair restoration surgeon can review your case in detail.
Dr. Nav Vikram is a Hair Restoration Surgeon and Trichologist based in Chandigarh, Punjab, India. Website: https://myneograftindia.com