Hair loss has several effective treatments, and the right one depends on how much hair you’ve lost, what’s causing it, and whether you’re male or female. Most people with pattern hair loss (the gradual thinning driven by genetics and hormones) can slow it down or regrow some hair with medication, and many can combine approaches for better results. The key is starting early, because treatments work best on follicles that are thinning rather than ones that have gone completely dormant.
Medications That Slow or Reverse Thinning
Two medications form the backbone of hair loss treatment. Minoxidil is a topical liquid or foam you apply directly to your scalp. It works by increasing blood flow to hair follicles and extending the growth phase of each hair. You can buy it over the counter in 2% or 5% strengths. Finasteride is a prescription pill that blocks the hormone responsible for shrinking hair follicles in pattern baldness. The FDA approved it for hair loss in 1997.
Finasteride has strong clinical data behind it. In combined analyses from the original FDA trials, only 14% of men taking finasteride lost hair over 12 months, compared to 58% of men on a placebo. By 24 months, 80% of men on finasteride reported that their hair loss had slowed, 69% reported visible hair growth, and 58% said their bald spot was getting smaller. These numbers make finasteride one of the most reliable options for men with pattern hair loss.
Minoxidil works for both men and women and doesn’t require a prescription. Results vary, but roughly 40 to 60% of women using the 2% solution see meaningful regrowth or stabilization. The 5% version bumps that to 50 to 70%, though it carries a higher risk of scalp irritation. Interestingly, a six-month trial comparing 5% foam (used once daily) to 2% solution (used twice daily) found no significant difference in hair count between the two groups, suggesting that the lower strength used more frequently can match the stronger version.
What to Expect Month by Month
Hair loss treatments test your patience. Nothing visible happens for the first several weeks. The earliest sign, usually around weeks two to four, is something you stop noticing: less hair in the shower drain, less on your pillow, less coming out when you brush. Your hair won’t look different in the mirror yet.
Around months three to four, short fine hairs start appearing in thinning areas, along the hairline, through the part, at the temples and crown. These “baby hairs” are thinner and shorter than your mature hair because they’re just entering their growth phase. By months four to six, those new hairs thicken and lengthen, producing a noticeable increase in density. It’s not a dramatic transformation, but it’s measurable.
The result approaches its peak between months six and nine, as regrown hairs reach their full thickness and blend in with the rest of your hair. By month 12, the full outcome is visible. Every follicle that was going to respond has responded. This is why dermatologists recommend committing to at least a year before judging whether a treatment is working.
Side Effects Worth Knowing About
Minoxidil’s most common side effect is scalp irritation, especially with the liquid formulation (the foam tends to be gentler). Some people experience temporary increased shedding in the first few weeks as weaker hairs fall out to make room for new growth. This is normal and resolves on its own.
Finasteride’s side effects get more attention, particularly sexual ones. In clinical trials of over 1,500 men, 4.2% of finasteride users reported sexual side effects compared to 2.2% on placebo. That breaks down to decreased libido in 1.9% (vs. 1.2% on placebo), erectile issues in 6.8% (vs. 3.2%), and ejaculation changes in 2.3% (vs. 0.5%). Only 1.4% of men on finasteride dropped out of studies because of these effects. For most men, the risk is small, but it’s real and worth discussing before starting.
Treatments for Women
Women with pattern hair loss have fewer FDA-approved options. Minoxidil is the only one. The 2% solution is the standard starting point, particularly for mild thinning or if you’re sensitive to medications. The 5% version is an option for moderate to severe loss, though your doctor may still recommend starting lower.
Spironolactone is widely prescribed off-label for female hair loss. It works by blocking the effects of androgens (the hormones that drive follicle miniaturization) at the scalp level. The typical dose is 100 mg daily, though prescriptions range from 25 to 200 mg. It requires a minimum of six months to judge effectiveness, and it’s not safe during pregnancy because it can affect fetal development. It’s often used alongside minoxidil for a combined approach.
PRP Injections
Platelet-rich plasma therapy involves drawing a small amount of your blood, concentrating the growth-factor-rich platelets, and injecting them into thinning areas of your scalp. It’s an in-office procedure that takes about 30 minutes.
The typical protocol is one session every two to three weeks for three months. A small study found that this schedule increased the average number of follicles from 71 to 93 per treatment area. A 2019 study comparing PRP to minoxidil over six months found PRP performed significantly better. After the initial series, you’ll need maintenance sessions, typically once a year, to sustain results. PRP isn’t covered by insurance and costs vary widely, usually several hundred dollars per session.
Low-Level Laser Therapy
At-home laser devices (combs, caps, and helmets) use red light at wavelengths around 650 nanometers to stimulate hair follicles. A meta-analysis of FDA-cleared devices found they produced a significant increase in hair density compared to sham devices. One trial showed an average gain of about 20 hairs per square centimeter over 26 weeks, while another found a 14.7% increase in hair counts at 24 weeks.
These devices work best as an add-on to medication rather than a standalone fix. One study found that combining laser therapy with minoxidil produced a 43.7% increase in hair density at four months, compared to about 34% for either treatment alone. Sessions typically run 10 to 25 minutes several times per week, depending on the device.
Hair Transplant Surgery
When thinning has progressed beyond what medication can reverse, hair transplant surgery moves healthy follicles from the back and sides of your scalp (where hair is genetically resistant to thinning) to the areas that need it. There are two main techniques.
FUT (follicular unit transplantation) removes a thin strip of scalp from the donor area, and individual follicle groups are separated under a microscope. It leaves a linear scar that’s hidden by surrounding hair. FUE (follicular unit extraction) harvests individual follicle groups one at a time using a tiny punch tool, leaving small dot-like scars that are nearly invisible even with short hair.
FUT consistently produces higher graft survival rates. In a comparative study, FUT grafts survived at about 86%, while FUE grafts survived at roughly 70% (after excluding one outlier patient). This doesn’t mean FUE produces bad results, but it’s a meaningful difference if you need maximum density from a limited donor supply. FUE appeals to people who want to wear their hair very short or want to avoid a linear scar. Many surgeons recommend one technique over the other based on the size of the area being treated and your hair characteristics.
Transplanted hair typically falls out within the first few weeks (this is expected), then begins regrowing around month three or four. Full results take 12 to 18 months. Most people still need to continue medication after a transplant to protect the non-transplanted hair from continued thinning.
Supplements: What Actually Works
Biotin is the most commonly marketed supplement for hair loss, but the evidence doesn’t support it for people who aren’t deficient. A review in the Journal of Clinical and Aesthetic Dermatology concluded that biotin supplementation is not supported by high-quality studies for adults with sufficient biotin levels. One study found that men with pattern hair loss had lower biotin levels than controls, but no one in either group was truly deficient. Biotin has shown up in combination products alongside minoxidil and finasteride that did work, but there’s no way to attribute the results to the biotin itself.
If you suspect a nutritional deficiency is contributing to hair loss (iron, zinc, vitamin D, and protein deficiencies can all trigger shedding), a blood test can confirm it. Correcting a true deficiency can stop that type of hair loss, but popping supplements “just in case” when your levels are normal won’t make your hair grow faster or thicker.