Androgenic alopecia can be slowed, stopped, and partially reversed with the right combination of treatments, but the key is starting early. Most people see hair loss stop within three months of beginning treatment, with visible regrowth becoming statistically significant by six months. No single treatment works for everyone, and results depend on how much follicle miniaturization has already occurred. Here’s what actually works, how each option compares, and what kind of timeline to expect.
Why Hair Follicles Shrink in the First Place
Androgenic alopecia comes down to one hormone: dihydrotestosterone, or DHT. An enzyme in your scalp converts regular testosterone into DHT, which binds to receptors in the base of your hair follicles with far greater strength than testosterone itself. Once attached, DHT triggers a chain reaction that shuts down the signals your follicles need to regenerate. It also promotes cell death in the follicle’s growth center.
Over time, follicles gradually shift from producing thick, pigmented terminal hairs to fine, wispy vellus hairs. This is miniaturization. The enzyme responsible for creating DHT doesn’t decline with age, so without intervention, the process continues indefinitely. Every effective treatment for androgenic alopecia works by either reducing DHT levels, blocking it at the follicle, or stimulating growth through a separate pathway.
DHT Blockers: The Most Effective First Step
Blocking DHT production is the most direct way to stop follicle miniaturization. Finasteride, a daily oral pill, inhibits the enzyme that converts testosterone to DHT. In a five-year study tracked by the International Society of Hair Restoration Surgery, 65% of men with mild to moderate hair loss saw reduced shedding or actual regrowth. The catch: you have to keep taking it. Results reverse if you stop.
Dutasteride blocks more forms of the converting enzyme than finasteride does, and head-to-head comparisons consistently show it outperforms finasteride in hair count. One study found dutasteride at a standard dose increased hair count by about 24 hairs in the measured area, compared to just 4 hairs for finasteride. Another large trial showed a similar pattern with even larger absolute numbers. Dutasteride is prescribed off-label for hair loss in many countries, so availability varies depending on where you live and your prescriber’s comfort level.
Both medications carry a risk of sexual side effects, including reduced libido and erectile changes, which resolve for most people after stopping. These side effects are relatively uncommon but worth discussing before starting.
Minoxidil: Growth Stimulation Without Hormones
Minoxidil works through a completely different mechanism than DHT blockers. Rather than addressing the hormonal cause, it stimulates blood flow and extends the growth phase of hair follicles. The exact biological pathway still isn’t fully understood, but controlled trials consistently show it increases hair density.
Available as a topical liquid, foam, or now in oral low-dose form, minoxidil typically needs several months of daily use before visible results appear. Growth only lasts as long as you continue using it. Most dermatologists recommend pairing minoxidil with a DHT blocker for the best outcome, since they attack the problem from two different angles.
Topical Anti-Androgens: A Newer Option
Clascoterone is a topical solution that blocks androgen receptors directly in the scalp, preventing DHT from attaching to follicles without affecting hormone levels elsewhere in the body. Phase 3 trials involving 1,465 patients across the US and Europe showed statistically significant improvements in hair count compared to placebo, with up to 539% relative improvement in target-area hair count versus the control group. The safety profile was favorable, with minimal skin irritation and no significant systemic side effects.
This is a particularly appealing option for people who want to avoid the systemic effects of oral DHT blockers. It’s currently available for men, and research into its use for women is ongoing.
Treatment Options Specific to Women
Women with androgenic alopecia can’t use finasteride or dutasteride during childbearing years due to the risk of birth defects. Instead, spironolactone is the most commonly prescribed anti-androgen for female pattern hair loss. It works by blocking androgen receptors and reducing androgen production.
A meta-analysis of multiple studies found that about 57% of women saw improved hair loss overall. That number climbed to nearly 66% when spironolactone was combined with other treatments like topical minoxidil, compared to 43% with spironolactone alone. In one large retrospective study, 74% of women reported improvement or stabilization. Typical doses range from 25 to 200 mg daily, adjusted based on response and tolerability. Because spironolactone affects potassium levels and blood pressure, it requires monitoring through blood work.
PRP Injections
Platelet-rich plasma therapy involves drawing your blood, concentrating the growth factors, and injecting them into the scalp. A clinical study measured hair density increasing from about 41 hairs per square centimeter at baseline to 66 hairs per square centimeter after 12 weeks of treatment. A meta-analysis of nine randomized controlled trials confirmed a statistically significant increase in hair density after three to six months compared to placebo.
PRP is typically done as a series of three to four sessions spaced a month apart, followed by maintenance sessions every few months. It’s not covered by insurance, and costs generally run several hundred dollars per session. PRP works best as an add-on to medication rather than a standalone treatment.
Low-Level Laser Therapy
Laser caps and combs that emit red light in the 500 to 1,100 nanometer range have FDA clearance for treating androgenic alopecia in both men and women. The HairMax Lasercomb was the first device cleared, in 2007 for men and 2011 for women. Controlled trials showed that laser therapy significantly increased both hair density (17.2 more hairs per square centimeter versus a decrease of 2.1 in the control group) and hair thickness.
However, there’s a meaningful gap between the numbers and what people actually notice. The same study found no prominent difference in overall global appearance between the treatment and control groups. Laser therapy is best thought of as a mild booster rather than a primary treatment.
Hair Transplant Surgery
When follicles have fully miniaturized and medications can’t revive them, hair transplantation moves DHT-resistant follicles from the back and sides of your scalp to thinning areas. Modern follicular unit extraction takes individual follicle groupings and places them at natural angles in the recipient area.
Graft survival rates in experienced hands typically range from 90% to 98%, though several factors affect that number. Time outside the body matters: grafts placed within 2 hours survive at about 95%, dropping to 79% at 24 hours. Density of placement also plays a role. At 10 grafts per square centimeter, survival sits around 97%, but packing them to 30 per square centimeter drops survival to roughly 72%.
A transplant doesn’t stop the underlying process. Most surgeons require patients to stay on finasteride or minoxidil afterward to protect both the transplanted and existing native hair from continued miniaturization.
Supplements: What the Evidence Actually Shows
Saw palmetto is the most widely marketed natural DHT blocker, and it does have mild anti-androgenic properties in lab settings. But comprehensive meta-analyses have repeatedly failed to demonstrate significant improvement in androgen-dependent conditions when saw palmetto is compared to actual anti-androgenic medications. The data supporting its use for hair loss is largely drawn from studies on prostate enlargement, and even those results have been called into question by larger, more rigorous trials.
Saw palmetto carries minimal side effects and low drug interaction potential, which is why it remains popular as a complementary remedy. But if you’re relying on it as your primary strategy, you’re likely losing ground while the miniaturization process continues.
Realistic Timelines for Results
Across most treatments, the pattern follows a consistent arc. Shedding typically slows or stops around the three-month mark. Measurable regrowth becomes statistically significant at six months. Improvement can continue building for up to 24 months, with the most dramatic changes visible between months 6 and 12.
Many people experience an initial shedding phase in the first few weeks, particularly with minoxidil. This happens because weaker hairs are pushed out as stronger growth cycles activate. It’s temporary and generally a sign the treatment is working.
The single most important factor in outcomes is timing. Treatments are far more effective at maintaining follicles that are miniaturizing than at reviving ones that have gone dormant entirely. Starting at the first signs of thinning, rather than waiting for visible scalp exposure, gives you the widest range of options and the best chance of meaningful results.