Hair Loss: What Actually Works, and What's Just Marketing

If you've noticed your hairline creeping back, your crown thinning under bright bathroom lights, or more hair than usual in the shower drain, you're in good company — and you're also a target. Walk down Pattaya's clinic strips and you'll be offered PRP, "stem cell" scalp injections, exosome therapy and a dozen branded "regrowth" packages, often within the same afternoon. The frustrating truth is that most hair loss is the same common, genetic kind, and only a couple of treatments are actually proven to help. This is an honest guide to what works, what's merely promising, and what's mostly marketing — written for expats and medical travellers who'd rather spend on evidence than on hope. It's general education, not a diagnosis; your own plan is set with a doctor who can examine your scalp.

Why is my hair thinning?

By far the most common cause is androgenetic alopecia (AGA) — "male-pattern" or "female-pattern" hair loss. It's genetic and hormone-driven: a hormone called DHT (a derivative of testosterone) progressively miniaturises sensitive follicles, so each new hair grows finer and shorter than the last, until eventually the follicle stops producing a visible hair at all ¹. It's not damage from a shampoo or a one-off stress — it's a slow, programmed shrinking.

It is also extremely common. Androgenetic alopecia affects up to around half of both sexes over a lifetime, and by about age 70 it's present in roughly 80% of Caucasian men and around 50% of women ¹. The pattern differs by sex: men typically thin at the temples and hairline and over the crown, while women usually see diffuse thinning across the crown and a widening part, with the frontal hairline often kept ¹.

Is it pattern baldness, or something else?

This matters, because not all hair loss is AGA — and some causes are temporary or treatable in a completely different way:

• Telogen effluvium is a temporary, diffuse shedding that follows a trigger — a serious illness, surgery, crash diet, major stress, or childbirth. It's usually reversible once the trigger passes, and the hair generally recovers ¹².
• Alopecia areata is an autoimmune condition causing patchy, often round bald spots, where the immune system attacks the follicles. It has different causes and different management again ¹.

Because these are different problems with different solutions, the first step is an accurate diagnosis, not a treatment package. See a dermatologist if your loss is rapid, patchy, or comes with scalp symptoms such as redness, scaling, pain or itching — those can point to a different, treatable cause ². Chasing PRP for what is actually telogen effluvium, for instance, would be spending money on the wrong problem.

What actually works: the proven treatments

For androgenetic alopecia, two treatments are the evidence-based standards that dermatology bodies actually recommend ³:

• Topical minoxidil — used by both men and women, applied to the scalp daily.
• Oral finasteride — for men only; it is not prescribed to women of childbearing potential because of a risk of birth defects.

Both work by slowing loss and producing modest regrowth in many people. Two honest caveats come with them. First, they take months — typically several — before any change is visible, so patience is part of the treatment. Second, the benefit lasts only as long as you keep using them: if you stop, the gains are lost and thinning resumes ³. They manage AGA; they don't cure it. That's not a flaw in the science — it's the nature of an ongoing, genetic condition.

Does PRP actually regrow hair?

PRP (platelet-rich plasma — your own blood, spun to concentrate platelets and growth factors, then injected into the scalp) is the one regenerative option here with real, if still modest, trial evidence. A 2024 systematic review and meta-analysis found that PRP produced a mean increase of about +27.55 hairs per cm² versus control (95% confidence interval roughly 14 to 41) in androgenetic alopecia ⁴. That's a measured effect, not a testimonial.

The honest caveat is just as important: the authors rate the certainty of that evidence as low, citing high variability between studies, no standardised protocol, and a risk of publication bias ⁴. So the fair summary is "a reasonable adjunct, not a guaranteed or stand-alone cure" — best thought of as a possible add-on alongside the proven treatments, discussed with a clinician. For the full picture of what PRP is and isn't, see our guide to PRP, and our broader look at what's real and what's hype in regenerative skin treatments.

What about "stem cell" and exosome hair treatments?

This is where the marketing gets loudest and the evidence gets thinnest. "Stem cell" hair therapies and exosome scalp injections are sold as cutting-edge cures, but the published reviews are far more restrained. Systematic reviews of stem-cell approaches for androgenetic alopecia describe them as only "promising", limited by small samples and the absence of standardised protocols ⁵. A 2025 systematic review of exosomes for hair regeneration reaches a similar verdict — early signals, small studies, and not enough consistent data to pool into a meta-analysis ⁶.

Crucially, there is no approved stem-cell or exosome product for hair loss ⁵⁶. When something is genuinely proven, you don't have to take it on faith from an advertisement. Treat the words "stem cell" and "exosome" on a hair-loss menu as a reason for caution, not extra excitement.

What we see at the clinic

Pattaya clinics advertise PRP, "stem cell" and exosome scalp treatments heavily — they're some of the most aggressively marketed services in town, often promising what the evidence simply doesn't support. Our approach is deliberately the opposite. We start with what's actually causing your hair loss, because treating the wrong problem wastes your money; for anything that needs a prescription or a firm diagnosis, you'll see an appropriate doctor. Where a regenerative add-on like PRP is appropriate, we'll offer it with honest expectations about its low-certainty evidence — as a possible adjunct, never a guaranteed fix. And we won't sell you the words "stem cell" or "exosome" as if they were a result. We'd rather under-promise on your hair than over-claim, and if a treatment's main selling point is its name, that's our cue to slow down too.

Common questions

Is hair loss reversible? It depends entirely on the cause. Telogen effluvium (temporary shedding after stress, illness or childbirth) usually recovers on its own ¹. Androgenetic alopecia isn't "reversed", but the proven treatments can slow it and give modest regrowth — for as long as you keep using them ³.

Can women take the same treatments as men? Minoxidil is used by both sexes. Oral finasteride is for men only and is not prescribed to women of childbearing potential because of a risk to a developing baby ³. Female-pattern loss is also worth a doctor's assessment, since it can have other contributors.

Is PRP worth trying for hair? There's genuine trial evidence that PRP increases hair density in androgenetic alopecia (about +28 hairs/cm²), though the certainty is rated low and results vary between people ⁴. It's a reasonable option to discuss as an add-on — not a stand-alone cure.

Are "stem cell" or exosome scalp injections better than the standard treatments? There's no evidence that they are. Reviews call them only "promising", with small studies and no standardised protocol, and there's no approved stem-cell or exosome product for hair loss ⁵⁶. The proven treatments remain minoxidil and finasteride ³.

When should I see a doctor rather than buy a treatment? Soon — especially if the loss is rapid, patchy, or comes with scalp redness, scaling, pain or itching, which can signal a different and treatable cause ². An accurate diagnosis should always come before a treatment package.

Key takeaway

Most hair loss is androgenetic alopecia — common, genetic, and driven by DHT slowly miniaturising the follicles ¹. The treatments that are actually proven are topical minoxidil and oral finasteride: modest, slow, and effective only while you keep using them ³. PRP is a reasonable add-on with real but low-certainty support ⁴, while "stem cell" and exosome scalp treatments — for all the marketing around them in Pattaya — remain unproven, with no approved product behind them ⁵⁶. Start with an honest diagnosis, spend on evidence rather than hype, and be most sceptical of whatever is advertised the loudest.