Hair loss has a wide range of causes, and what you should do about it depends entirely on which type you’re dealing with. The most common form, pattern hair loss, affects roughly half of men and women by middle age and responds well to early treatment. Temporary shedding from stress or nutritional gaps often resolves on its own once the trigger is addressed. The key is figuring out what’s driving your hair loss, then choosing the right approach.
Identify the Type First
Pattern hair loss (androgenetic alopecia) is the most common cause. In men, it typically starts with a receding hairline or thinning at the crown. In women, it shows up as gradual widening of the part. This type is driven by a hormone called DHT that shrinks hair follicles over time, and it’s progressive, meaning it won’t stop without intervention.
Temporary shedding, called telogen effluvium, looks different. You’ll notice more hair falling out all over your head rather than thinning in specific spots. It’s triggered by a stressor or change to your body: surgery, illness, a crash diet, childbirth, or emotional stress. The tricky part is that shedding typically starts about three months after the triggering event, so the connection isn’t always obvious. During an episode, up to 70% of your actively growing hairs can prematurely shift into the resting phase and fall out. The good news is this type usually resolves within six to nine months once the trigger is gone.
Check Your Nutritional Baseline
Before starting any treatment, it’s worth getting your iron and vitamin D levels checked through a simple blood test. Research in women with hair loss found that those with telogen effluvium had average ferritin (stored iron) levels of just 14.7 μg/l, compared to 43.5 μg/l in women without hair loss. Vitamin D levels showed an even more dramatic gap: women with shedding averaged 28.8 nmol/l, while controls averaged 118.2 nmol/l. Hair loss severity increased as these levels dropped further.
If your levels are low, supplementation alone may reduce shedding. Ferritin levels below about 30 μg/l and vitamin D below about 40 nmol/l are the thresholds where hair loss becomes more likely. These are levels a standard blood panel can measure, and correcting them is straightforward.
Topical Minoxidil: The Starting Point
Minoxidil is the most accessible treatment for pattern hair loss. It’s available over the counter in 2% and 5% concentrations as a liquid or foam applied directly to the scalp. It works by increasing blood flow to follicles and extending the growth phase of hair.
Clinical trials show hair growth improvements ranging from 17% to 70%, depending on the individual. In a 48-week trial of 393 men, the 5% concentration produced significantly better results than the 2% version. Interestingly, concentrations above 5% (like 10%) didn’t offer additional benefit for the areas most prone to thinning, so more isn’t necessarily better.
The catch is patience. Most people see early improvements in 3 to 6 months, with more noticeable regrowth closer to the 9 to 12 month mark. You also need to keep using it. Stopping minoxidil means the hair it helped grow will gradually thin again.
DHT Blockers for Pattern Hair Loss
For pattern hair loss specifically, blocking DHT at the scalp is the most targeted approach. The standard prescription medication for this reduces DHT levels in scalp tissue by about 64% and in the bloodstream by about 71%. Even low doses achieve near-maximum DHT reduction, which is why the standard daily dose works well for most people.
Sexual side effects are the primary concern, but they’re less common than many people assume. Clinical data shows they occur in roughly 2% to 4% of users, with erectile difficulty being the most reported, followed by changes in libido. A long-term study found these side effects dropped to 0.3% or less by the fifth year of treatment, suggesting most people who experience them either adapt or discontinue early. This is a prescription-only option, and it’s primarily studied in men.
Combining Treatments for Better Results
One of the more promising findings in recent years is that microneedling (using a derma roller with tiny needles on the scalp) dramatically improves results when paired with minoxidil. In a 12-week trial, the combination group saw a mean increase of 12.8 hairs per square inch in the target area, compared to just 1.9 in the minoxidil-only group. Every single participant in the combination group saw some increase in hair count, while about 24% of the minoxidil-only group saw no improvement at all.
Microneedling creates tiny channels that help minoxidil penetrate deeper. It also triggers a wound-healing response that stimulates growth factors in the scalp. Home derma rollers with 0.5 to 1.5mm needle lengths are widely available, though it’s worth noting the researchers cautioned that while results were statistically significant, they weren’t always “cosmetically significant,” meaning the improvement may be subtle rather than dramatic.
Low-Level Laser Therapy at Home
Laser caps and combs that emit red light at 655 nanometers are another option, and they do have clinical evidence behind them. A randomized controlled trial using a laser helmet every other day for 16 weeks reported a 35% increase in hair growth among men with pattern hair loss. Another study found improvements in hair count of 55% to 120% depending on the area treated, with the crown responding best. The largest randomized trial, testing laser comb devices, showed statistically significant increases in terminal hair density compared to sham devices in both men and women.
These devices require consistent use (typically every other day for 15 to 25 minutes) and work best as a complement to other treatments rather than a standalone solution. Results tend to be modest in terms of visible cosmetic change.
PRP Injections
Platelet-rich plasma therapy involves drawing your blood, concentrating the growth-factor-rich platelets, and injecting them into the scalp. In a randomized placebo-controlled trial, three treatments spaced 30 days apart produced a mean increase of 45.9 hairs per square centimeter compared to baseline. That’s a meaningful bump in density, though results vary between individuals.
PRP is typically offered as a series of three to four initial sessions, followed by maintenance treatments every few months. It’s not covered by insurance and usually costs several hundred dollars per session. It works best for people with thinning hair rather than completely bald areas, since it stimulates existing follicles rather than creating new ones.
Hair Transplant Surgery
When hair loss is more advanced, transplant surgery moves healthy follicles from the back and sides of the scalp (which are resistant to DHT) to thinning areas. There are two main techniques.
FUE (follicular unit extraction) removes individual follicle groups one at a time. It leaves tiny dot scars that are nearly invisible, costs $4 to $10 per graft, and a typical procedure of 2,000 grafts runs $7,000 to $12,000. FUT (follicular unit transplantation) removes a strip of scalp from the back of the head, which means a linear scar but lower cost: $2 to $5 per graft, with 2,000 grafts costing $6,000 to $10,000. Larger sessions of 3,000 grafts can reach $10,000 to $18,000 for FUE or $8,500 to $14,000 for FUT.
Transplanted hair typically falls out within the first few weeks (a normal part of the process), then begins regrowing around month three or four. Full results take 9 to 12 months. Most people still need to use medical treatments afterward to protect the non-transplanted hair from continued thinning.
Realistic Timelines and Expectations
Regardless of which treatment you choose, hair grows slowly. Most treatments show early improvements in texture and reduced shedding within three to six months. Visible regrowth that other people might notice takes six to twelve months. This is the single biggest reason people abandon treatments that would have worked: they quit at month two or three, right before results would have become apparent.
Taking photos in the same lighting every four weeks gives you an objective record of progress, since day-to-day changes are too subtle to notice in the mirror. The earlier you start treatment in the thinning process, the better your results will be. It’s far easier to maintain existing hair than to regrow what’s already been lost.