Hair loss treatment options: what the evidence supports

Search "hair loss treatment" and you get a wall of options, almost none of which tell you how well they actually work. So here is the short version, ranked by what the evidence supports. Two medications do most of the work. A few others help at the edges. And a long shelf of pills and serums sell hope without much behind them.

This guide is the map. The deeper pieces in this library go drug by drug; this one tells you where each option sits and why.

The two treatments with the strongest evidence

For male pattern hair loss, two drugs are FDA-approved and backed by decades of trials. They attack the problem from opposite ends, which is exactly why they pair well.

• Finasteride is a once-daily pill that blocks the enzyme converting testosterone into DHT. DHT is what slowly shrinks genetically sensitive follicles along the hairline and crown, so finasteride goes after the cause. In studies, the large majority of men either keep the hair they have or regrow some of what was thinning.
• Minoxidil works on the follicle itself rather than the hormone. It extends the growth phase and improves blood flow to the scalp, nudging dormant follicles back into producing hair. The familiar form is the topical solution or foam. A low-dose oral version, taken under a clinician's supervision, has become popular because it's simpler to use and many men tolerate it well.

Because finasteride lowers DHT and minoxidil drives growth, using both targets the loss from two directions at once. Most men who want the best shot at holding and rebuilding their hair run them together. If you're weighing one against the other, the finasteride vs. minoxidil comparison lays out who benefits most from each.

Finasteride protects the hair you still have. Minoxidil tries to wake up what's fading. Neither one fully covers what the other does, which is why the pair beats either alone.

— John Venzor, DO

One practical note before you start anything: not all thinning is androgenetic. A clinician should confirm the diagnosis first, because the treatment changes completely if the real cause is something else.

Procedures and add-ons

Past the two first-line drugs, a second tier has some evidence but a weaker or narrower case. These are worth considering as additions, usually alongside finasteride rather than instead of it.

• Dutasteride blocks DHT more completely than finasteride and is used off-label for hair loss. Some men switch to it when finasteride alone isn't holding the line. It needs a clinician's judgment, since the trade-offs differ.
• Low-dose oral minoxidil is also off-label, prescribed and monitored by a clinician. For men who dislike applying a topical daily, a small pill can be easier to stick with, and consistency is most of the battle.
• Low-level laser therapy (laser caps and combs) has modest evidence. It may add a little, but it won't carry the result on its own.
• Platelet-rich plasma (PRP) involves injecting concentrated platelets from your own blood into the scalp. The early data look promising but vary a lot between studies and clinics, and it's an in-office procedure that adds up in cost.
• Ketoconazole shampoo is a minor adjunct. There's a plausible mechanism and some small studies, but treat it as a supporting role, not a treatment.

Then there's the surgical option. A hair transplant moves DHT-resistant follicles from the back and sides of your scalp, where the hair tends to stay for life, up to the thinning areas. The relocated hair is permanent. But it's surgery, it's expensive, and it does nothing to protect the original hair around the grafts. That's why surgeons routinely keep men on finasteride afterward, so the transplant isn't framed by hair that keeps receding.

What probably won't move the needle

A large share of the hair-loss market is supplements, and most of it doesn't hold up. The honest version:

• Biotin only helps if you're genuinely biotin-deficient, which is rare in men eating a normal diet. If your levels are fine, more biotin does nothing for male pattern hair loss.
• Saw palmetto is pitched as a natural DHT blocker. The evidence is weak and inconsistent, and it's far less effective than finasteride. It isn't a substitute.
• "Hair growth" multivitamins and gummies bundle biotin with a few other nutrients and lean on marketing. Unless you have a specific deficiency, they don't change the course of androgenetic alopecia.

None of these are dangerous in normal amounts. The issue is opportunity cost. Months spent on a gummy are months DHT keeps working on your follicles, and that's time you don't get back.

Why starting early matters most

The single most useful thing to understand about treating hair loss: you can protect far more than you can regrow. A follicle that's been shrinking for years but still produces a thin hair can often be revived. One that's fully shut down and gone smooth usually can't. Treatment slows the loss, maintains what you have, and partially regrows what was on the way out. It doesn't resurrect dead follicles.

That changes the math on timing. The man who starts at the first sign of a receding hairline has far more to work with than the one who waits until the crown is bare. So the realistic goal isn't a teenage hairline. It's keeping what you've got and recovering some of the recent loss, which is an outcome the evidence actually supports.

One more thing worth saying plainly: these treatments work only while you use them. Stop finasteride or minoxidil and DHT picks up where it left off, with the gains fading over the following months. Treating male pattern hair loss is ongoing, not a one-time fix. Knowing that up front is the difference between sticking with it and quitting right before the results would have shown.

Common questions