The Ultimate Guide to Male Hair Loss: Causes, Treatment and Regrowth

Some men don’t mind losing their hair. For others it’s part of how they see themselves: it frames the face, signals health, and shapes confidence in a way that carries into social and professional life. It’s okay to care about that, and to do something about it.

With modern medicine, hair loss is now largely treatable, and some men regain noticeable density. Unfortunately, it’s also confusing to navigate: side effects, misinformation and ineffective treatments waste a lot of time, money and sanity.

It’s not always as simple as taking one medication, either. Good long-term results come from understanding the whole picture, medical and cosmetic, and how the pieces work together toward the goal: keeping as much hair as possible, and regrowing what can be regrown.

That’s what this guide is: the complete picture of hair loss treatment for men, from what’s happening on your scalp to what actually works.

Which Hair Loss Treatments for Men Actually Work?

Here is the short version before the detail. Finasteride and minoxidil remain the treatments with the highest level of evidence for male pattern hair loss, and everything else is judged against them.

Treatment	What it does	Evidence	US status
Oral finasteride	Lowers DHT	Strong: large randomized trials	FDA-approved
Topical minoxidil	Stimulates growth	Strong: large randomized trials	FDA-approved, OTC
Oral dutasteride	Lowers DHT more broadly	Moderate: fewer trials	Off-label
Low-dose oral minoxidil	Stimulates growth	Moderate: growing trial data	Off-label
Topical finasteride	Lowers DHT, less systemic exposure	Moderate: one phase III trial	Compounded, off-label
Microneedling with minoxidil	Improves minoxidil response	Moderate: meta-analyses of small trials	Procedure
Low-level laser therapy	Stimulates growth	Moderate: protocols vary	FDA-cleared devices
Platelet-rich plasma (PRP)	Delivers growth factors	Limited: small trials	Procedure
Ketoconazole shampoo	Supports scalp health	Limited: few small studies	OTC and prescription
Nutritional supplements	Varies by product	Limited: small trials	Supplement
Hair transplant	Moves DHT-resistant follicles	Established	Surgery

Kelly et al. (2016). Drugs

In a meta-analysis of randomized trials, finasteride 1 mg, 2% and 5% minoxidil and low-level laser therapy were all superior to placebo in men, and each row above is covered, with its own sources, further down the page.

This table is an overview of the evidence and not a recommendation for any individual.

Adil & Godwin (2017). Journal of the American Academy of Dermatology

How Do You Know if You Are Losing Your Hair?

The biggest mistake most men make is not being aware of the issue in the first place. Hair loss often sneaks up on people because it’s gradual, and not something you necessarily want to talk about or accept.

There’s also a ton of misinformation about hair loss, which is why getting science-based information and connecting with medical professionals is important.

The main idea, though, is that androgenetic alopecia, or male pattern baldness, does worsen over time. Initial signs usually develop in the teenage years, loss progresses in a pattern, and it becomes more common with age. The pattern is the tell: a receding hairline at the temples, thinning at the crown, or both, while the sides and back stay full. This means that becoming aware of and tackling the issue early, before too much hair is lost, will help you keep hair longer.

Kanti et al. (2018). Journal of the European Academy of Dermatology and Venereology

1. Realize you are experiencing hair loss.
2. Get an accurate diagnosis from a professional.
3. Decide whether to treat it, with which proven treatments, and how aggressively, based on your goals.

The best way to track hair loss is with pictures taken at set intervals under the same conditions: same angles, same lighting, and similar hair length and cleanliness, since all of those change how thick hair looks.

Counting hairs in the shower or drain makes less sense to me. Shedding rises and falls for all sorts of reasons, so a daily count gives you a noisy number and a lot to read into. If a change matters visually, photos will show it.

The Hair Growth Cycle, and Why Change Takes Months

Because the hair growth cycle is slow and happens in stages, changes take months to show.

Each follicle runs on its own clock, cycling through stages independently of its neighbors. Anagen is the growth phase, lasting two to eight years on the scalp. Catagen is a brief transition of about two weeks. Telogen is the resting phase, lasting about two to three months, after which the old hair is shed, and a new one starts growing in its place. Only around 9% of follicles are resting at any one time, and shedding 100 to 150 resting hairs a day is normal.

Natarelli et al. (2023). Journal of Clinical Medicine

Two things follow from this. First, the lag: because so much of the cycle is spent growing or resting, whatever caused a change in your hair happened months before you could see it. Second, it explains what androgenetic alopecia actually does. Affected follicles shrink with each cycle, so the hair that grows back is finer and shorter each time until the follicle stops producing anything visible. That’s miniaturization, and it’s why catching it early matters so much.

Likewise, certain medications may take longer for their full effects to appear. The finasteride label, for example, notes that daily use for three months or more is generally needed before benefit is observed.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Because of these cycles, some hair loss medications can result in the hair loss temporarily worsening before getting better visually. This is usually normal and generally considered a sign that the medication is working as intended.

I find that a lot of men end up checking every day, or get discouraged when nothing has changed after a few weeks. That is an understandable reaction to watching something you care about, but the hair cycle does not move on that timescale. You have to set reasonable expectations based on the medications you’re on and your goals. If you change things every week, you don’t give the hair cycle time to show results.

Androgenetic Alopecia: What Causes Male Pattern Baldness?

Androgenetic alopecia (AGA) is a progressive hair loss condition driven by genetic sensitivity to androgens (the hormones behind male characteristics like facial hair and voice depth), specifically dihydrotestosterone (DHT): a metabolite (byproduct) of testosterone. You will also see it called male pattern hair loss or male pattern baldness; they are the same condition. This guide uses AGA throughout.

It is the most common hair loss disorder, affecting up to 80% of white men over their lifetime.

Kanti et al. (2018). Journal of the European Academy of Dermatology and Venereology

Over time, the androgens gradually transform hair follicles from terminal strong hair into vellus-like miniaturized hair, without scarring. Balding scalp contains miniaturized follicles and more DHT than hair-bearing scalp, and treatments that lower DHT appear to interrupt a key step in men who are genetically predisposed. Once past a certain point of miniaturization, the hair follicle is usually not recoverable.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Family history matters. In a community survey of 740 men, having first- or second-degree relatives with AGA, particularly on the father’s side, raised the risk of moderate or severe loss, but family history alone won’t predict your own pattern precisely.

Su & Chen (2007). JAMA Dermatology

Diagnosing Male Pattern Baldness: The Norwood Scale

Diagnosis generally includes a personal medical and family history, details about the onset and progression of loss, and an examination of the scalp and hair. In most men, history and a clinical exam are enough to make the diagnosis, and trichoscopy, a magnified look at the scalp, can confirm it by showing variation in hair diameter and fine vellus hairs.

Kuczara et al. (2024). Journal of Clinical Medicine

AGA typically follows a set pattern of loss either on the frontal hairline region, mid-scalp area, vertex/crown area, or any combination of the above. It can also present as diffuse thinning across the entire genetically susceptible area of the scalp.

This pattern is classified by the Norwood-Hamilton Scale, which ranges from stage 1 to 7. Diffuse thinning isn’t well captured by the Norwood scale.

Norwood stage	What it looks like
1	Little or no recession at the hairline
2	Slight, often symmetrical recession at the temples
3	Deeper temple recession, the first stage usually considered balding (3 vertex adds early crown thinning)
4	Further frontal recession and a thinning crown, still separated by a band of hair
5	Frontal and crown areas enlarge and the band between them narrows
6	The band is gone, so front and crown join into one area
7	Only a horseshoe-shaped band remains around the sides and back

Norwood (1975). Southern Medical Journal

Some men may experience balding to the fullest extent of the scale, while others may taper off loss at a specific point in the scale. This influences what treatment options and cosmetic procedures make sense.

Other Forms of Hair Loss: Alopecia Areata, Telogen Effluvium and More

In men, pattern hair loss is by far the most common cause, but hair loss can happen for many other reasons, such as telogen effluvium, alopecia areata, traction alopecia, scarring alopecia, and even nutrient deficiency. Several of these can look like pattern loss at first glance, which is one reason a proper exam matters.

Khutsishvili et al. (2024). International Journal of Dermatology

See a doctor sooner rather than later if you notice any of the following:

• Sudden, round or patchy bald spots: the typical start of alopecia areata, an autoimmune condition that can also affect the beard, eyebrows and nails.

Maas et al. (2026). Journal of the American Academy of Dermatology

• Hair loss with scalp pain, burning, itching or redness: these can accompany scarring alopecias, which destroy follicles permanently, so early treatment matters.

Ezemma et al. (2023). Journal of the American Academy of Dermatology

• Sudden, heavy shedding all over the scalp: often telogen effluvium, which can follow stress, illness, poor sleep, nutritional deficiency or a new medication.

Natarelli et al. (2023). Journal of Clinical Medicine

This is why getting a proper diagnosis with a licensed medical provider is so important, and is exactly what Happyglow was built to do. We can fine-tune an approach to hair loss that fits your risk tolerance, preferences, history, goals, etc. Happyglow providers are knowledgeable about hair loss, and it is a core focus of their practice rather than an afterthought.

Hair Loss Blood Tests and Labs

As a man, the odds are that this is AGA. Still, it’s worth being sure, and blood markers can add context. For complex cases, markers like ferritin, thyroid panel, vitamin D, CBC, hormones, and zinc might be investigated. Thyroid problems in particular can show up as diffuse hair loss.

Natarelli et al. (2023). Journal of Clinical Medicine

If you take biotin, which is common in hair, skin and nail supplements, tell whoever orders your labs. High biotin levels can interfere with certain lab tests and produce falsely high or low results.

US Food and Drug Administration (2020). Testing for biotin interference in in vitro diagnostic devices

Because DHT inhibitors act on a hormone, some patients get a baseline hormone panel and a PSA level before starting. Finasteride lowers PSA, so any confirmed rise from your lowest value while on it should be checked, even if it’s still in the normal range.

For context on hormone panels, finasteride raised average testosterone by about 15% in studies, which stayed within the normal range, and didn’t meaningfully change other reproductive hormones. It is also metabolized mainly in the liver.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

For medications like oral minoxidil, basic blood pressure and heart rate baselines can be useful, since its most common side effects include cardiovascular symptoms. Some patients might require cardiac evaluations or discussion with a physician before taking this route.

Gupta et al. (2023). Skin Appendage Disorders

Evidence Literacy

A quick note on evidence before we get into treatments. Hair loss is noisy: seasonal shedding, lighting, a new medication, even a haircut can change how much hair you seem to have, so a single before-and-after photo proves very little.

“There’s a study” isn’t a guarantee either. Studies range from large, well-run trials to tiny ones with no control group, and being indexed on PubMed says nothing about which kind you’re looking at. The journal matters too, because standards differ a lot between them.

That’s why the sources in this guide come mostly from journals ranked Q1 or Q2 on Scimago, weighed for things like sample size and financial conflicts of interest. When the evidence for something is thin, we say so.

DHT Blockers: Why DHT Is the Thing You Have to Treat

As mentioned, preventing loss before damage occurs is generally easier than attempting to recover hair that has already been lost or miniaturized.

You shouldn’t rely on being able to recover lost hair, as different people will have varying levels of response to the medications. Some patients can only slow or stop hair loss on medication, while others can make seemingly perfect recoveries, even on lower doses or less intensive routines.

The core idea for male pattern hair loss, though, is DHT. Without reducing DHT, you’re largely delaying the inevitable. Medications like minoxidil are growth stimulants and can make the hair appear thicker and fuller, but they work mainly by stimulating growth rather than by lowering DHT, so if you don’t also treat the underlying driver, you will eventually lose progress as your hair follicles are still being attacked.

Kelly et al. (2016). Drugs

This is why the most common hair loss plans use a synergistic approach of a medication used to reduce DHT while simultaneously using a medication like minoxidil to stimulate growth. A meta-analysis of randomized trials found finasteride combined with topical minoxidil worked better than either alone, with similar safety.

Chen et al. (2020). Aesthetic Plastic Surgery

Finasteride and Dutasteride (DHT Inhibitors)

Testosterone converts to dihydrotestosterone (DHT) via the 5-alpha-reductase (5AR) enzyme. Finasteride and dutasteride are 5-alpha-reductase inhibitors. Both are taken orally, and both have been used topically.

5AR comes in two main forms (Type I and Type II), and the two medications vary in which forms they inhibit. Type I is predominant in the skin’s oil glands, including on the scalp, and in the liver, and is responsible for about one third of circulating DHT. Type II is found mainly in the prostate, hair follicles and liver, and is responsible for about two thirds. Finasteride is about 100 times more selective for Type II, and dutasteride inhibits both.

Finasteride was first approved by the FDA in 1992 for an enlarged prostate and is approved at 1 mg for male pattern hair loss. Finasteride reaches peak blood levels about 1 to 2 hours after a dose and reduces blood DHT by about 65% within 24 hours. It is metabolized mainly by the liver, and its mean terminal half-life is around 5-6 hours for men ages 18-60 and about 8 hours in men over 70. Circulating finasteride slowly accumulates after multiple doses.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Dutasteride was approved in 2001 for an enlarged prostate and is not approved for hair loss in the US, so it is used off-label. At 0.5 mg it reduces blood DHT by about 90%, and it stays in the body far longer than finasteride, with a half-life of about 5 weeks.

US Food and Drug Administration (2020). Avodart (dutasteride) prescribing information

Oral vs. Topical Finasteride and Dutasteride

Topical versions of both have been developed because oral finasteride is associated with systemic side effects.

The strongest evidence comes from a phase III randomized trial comparing a 0.25% topical finasteride spray with the standard 1 mg tablet. After 24 weeks, hair counts rose by a similar amount in both groups (20.2 versus 21.1 hairs per square centimeter), and a separate trial of a 1% gel against the tablet found similar results at six months.

Gupta & Talukder (2022). Journal of Cosmetic Dermatology

Two caveats: topical finasteride isn’t FDA-approved, and “topical” doesn’t mean it stays in the scalp: it lowers DHT in the blood too, and in one short study twice-daily application suppressed blood DHT about as much as the tablet. What it does is reduce the potential for systemic side effects, including sexual ones, with most reported effects staying at the application site as itching, burning, irritation or redness. The vehicle, concentration and schedule also vary between products, and a compounded topical isn’t a standardized dose the way a 1 mg tablet is.

Gupta & Talukder (2022). Journal of Cosmetic Dermatology

Topical dutasteride is further behind. It has been injected into the scalp (mesotherapy) and applied as a solution alongside microneedling, and both show some efficacy with fewer side effects than the oral form, but standardized protocols and large trials are still missing. Liposome and nanoparticle versions designed as true topicals are still in development.

Ding et al. (2024). Dermatology

Dutasteride vs. Finasteride: Dosing, Efficacy and Timelines

The standard oral finasteride dose for male pattern hair loss is 1 mg/day. Withdrawing treatment leads to reversal of its effect within 12 months.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

The standard oral dutasteride dose for hair loss is 0.5 mg/day. Dutasteride increased total hair count significantly more than finasteride. Rough efficacy order from most to least would look like this:

1. Dutasteride 0.5 mg
2. Finasteride 1 mg
3. Topical finasteride 1%

Although all are much more effective than placebo (doing nothing). In the same analysis, finasteride 1 mg, finasteride 5 mg and topical finasteride 1% were not significantly different from each other, so the gap between the last two is smaller than a ranked list suggests.

Gupta et al. (2022). Journal of Dermatological Treatment

Note: stronger is not automatically better. Dutasteride provides more hair count at the cost of inhibiting both forms of 5AR instead of just one, it’s off-label for hair loss in the US, and the sexual side effects and potential psychiatric risks still require attention. It’s something you and your medical provider should discuss and plan around.

Ding et al. (2024). Dermatology

Finasteride and Dutasteride Side Effects

Overall, finasteride is generally well tolerated.

DHT does play a role in erectile physiology, and sexual side effects are the ones most men ask about. In the hair loss trials, 3.8% of men on finasteride reported one or more sexual side effects, such as decreased libido, erectile dysfunction or ejaculation disorders, compared with 2.1% on placebo. These resolved in men who stopped treatment and in most of those who continued, and by the fifth year of treatment their incidence had fallen to 0.3%. Breast tenderness and enlargement have also been reported.

Since approval, the label has added reports of sexual dysfunction that continued after stopping treatment, sometimes called post-finasteride syndrome, as well as depression, suicidal ideation and behavior. Anyone who notices mood changes on finasteride should tell their prescriber promptly.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Depression was added to the FDA label in 2011 after rising patient complaints and analysis of adverse event reports. The authors of a 2022 review describe finasteride as reasonably tolerated, while stressing that patients need to be educated about possible short- and long-term side effects.

Gupta et al. (2022). Journal of Dermatological Treatment

Overall, the long-term risk isn’t fully defined. Many will argue that 5-alpha-reductase inhibitors are poison and will irreversibly damage you, and others will argue that DHT and the associated steroids are useless after puberty. Nuance is important, and the answer likely lies somewhere in between the two extremes. It seems unlikely that inhibiting DHT would have zero side effects, but for many men the tradeoff is worth it. That is an individual decision to make with a physician who knows your history.

Fertility, Pregnancy and Blood Donation

Pregnant women, or women who may become pregnant, should not handle crushed or broken finasteride tablets, due to the risk to a male fetus. Finasteride is not indicated for women or for anyone under 18.

For men’s fertility, a study of finasteride 1 mg found a median drop in ejaculate volume of 0.3 mL (11%) after 48 weeks, against 0.2 mL (8%) on placebo. Since approval, male infertility and poor semen quality have been reported, with normalization or improvement reported after stopping.

On exposure through semen, finasteride was undetectable in 60% of semen samples from men taking 1 mg a day. Even using the highest level measured and assuming full absorption, a partner’s exposure would be about 650 times lower than a dose that had no effect on DHT in men, and pregnant monkeys given about 930 times that estimated exposure had no abnormalities in male fetuses.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Dutasteride deserves its own note. In a 52-week study, it reduced total sperm count by 23%, semen volume by 26% and sperm motility by 18% on average, and two men had drops in sperm count of more than 90%, with only partial recovery 24 weeks later. Because it stays in the body for so long, men taking it should not donate blood until at least 6 months after their last dose, and women who are or may be pregnant should not handle leaking capsules, since it can be absorbed through the skin.

US Food and Drug Administration (2020). Avodart (dutasteride) prescribing information

For men with fertility issues, this is something to think about regarding whether treatment is worthwhile. For men struggling with fertility and wanting to conceive, switching from dutasteride to finasteride, or taking an extended break off any DHT inhibitor may be useful, a decision to make with your physician.

Fetal development is the critical window. If you use a topical, be aware it can transfer to other people, and even pets (more on that in the minoxidil section). If you share a home with a pregnant partner or young children, talk to your provider about limiting transfer, or whether an oral form makes more sense.

Either way, consulting with a relevant professional when planning for pregnancy is essential.

Minoxidil for Men

Minoxidil (brand name Rogaine) was originally developed as an oral blood pressure medication before being used topically for hair regrowth. In the US, topical minoxidil is approved over the counter at a maximum concentration of 5%. In recent years, lower-dose oral minoxidil has become a popular treatment for hair regrowth as well.

Goren & Naccarato (2018). Dermatologic Therapy

Minoxidil’s main function is stimulating hair growth; this is especially useful cosmetically because DHT inhibitors alone don’t always lead to regrowth of hair. It’s important to know that while minoxidil can thicken and grow hair visually, the effects are reversible, meaning they only last while you’re on the medication. In addition, minoxidil isn’t designed to stop the underlying process driving pattern loss, so relying on minoxidil alone is usually not sufficient long term. That said, for some men who would rather avoid DHT inhibitor side effects and mainly want visual density for a few years, it can be a reasonable route to discuss with a provider.

Custom topical strengths require a prescription and a pharmacy. Low-dose oral minoxidil is a generic prescription medication used off-label for hair loss.

Low-dose oral minoxidil might be a favorable option for patients who struggle with consistently applying topical minoxidil. A review of 17 studies (634 patients) found it effective and well tolerated in healthy patients who had trouble with topicals, which many find hard to stick with because of twice-daily application, changes to hair texture and scalp irritation.

Randolph & Tosti (2021). Journal of the American Academy of Dermatology

Happyglow currently offers topical minoxidil liquid in 3% and 6% strengths, and low-dose oral minoxidil at 5 mg, all requiring a prescription and delivered through our partner pharmacy.

Those are compounded to a prescription, which means a provider chooses the strength and form for you, something an over-the-counter purchase doesn’t give you.

Minoxidil and Pets

Something worth keeping in mind for pet owners: minoxidil is toxic to dogs and especially cats. In 211 poison-control cases, pets became ill even after small exposures like drops or licks, often from licking an owner’s skin or pillowcase, and 8 of the 62 cats that became ill died.

Pet owners should take precautions to prevent pets from coming into direct or indirect contact with the medication in any form.

Tater et al. (2021). Journal of the American Animal Hospital Association

How Does Minoxidil Work?

Minoxidil’s visual results come from increasing hair counts overall and the thickening of individual hair shafts.

Minoxidil is a prodrug (it is converted inside the body into its active form); sulfotransferase enzymes in the hair follicle convert it into minoxidil sulfate. People with higher sulfotransferase activity tend to respond better, which is part of why some people don’t respond as well as others. Only about 1.4% of topical minoxidil is absorbed through the skin.

Minoxidil acts through several pathways at once: it widens blood vessels, which explains its original use for high blood pressure and its potential systemic side effects, and it also has anti-inflammatory effects, activates the Wnt/β-catenin signaling pathway and may have some antiandrogen activity. It may also lengthen the growth phase and shorten the resting phase of the hair cycle.

Gupta et al. (2022). Journal of Dermatological Treatment

Minoxidil Dosage: Foam, Liquid and Oral Minoxidil

Increased concentration doesn’t correlate to increased efficacy. In a 36-week randomized trial of 90 men, 5% minoxidil was significantly more effective than 10%.

Ghonemy et al. (2021). Journal of Dermatological Treatment

A 2022 review also found the 5% solution and foam were not significantly different in efficacy from the 2% solution.

Gupta et al. (2022). Journal of Dermatological Treatment

Minoxidil is available as 2% solution, 5% solution, and 5% foam. The solution form traditionally contains propylene glycol to dissolve the drug, and in patients patch-tested for scalp reactions to minoxidil solution, propylene glycol was the cause in the majority.

Friedman et al. (2002). Journal of the American Academy of Dermatology

The 5% foam was formulated without propylene glycol, and in a 352-man randomized trial it significantly increased hair counts compared with placebo.

Olsen et al. (2007). Journal of the American Academy of Dermatology

Does Minoxidil Work, and How Long Does It Take?

Start with the number that matters most: only about 40% of patients regrow hair on 5% topical minoxidil, and response typically takes three to six months to appear. That is not a reason to skip it, but it is the reason a plan should be reviewed rather than assumed to be working, and the reason the combination approaches below exist. A test of follicular sulfotransferase activity ruled out about 96% of non-responders in advance.

Goren et al. (2015). Dermatologic Therapy

After six months, oral minoxidil 5 mg was significantly more effective than both 5% and 2% topical minoxidil in men. In a five-year study of 2% minoxidil, growth peaked at year one and declined gradually in later years. Results depend on continued use.

Gupta et al. (2022). Journal of Dermatological Treatment

Minoxidil Side Effects and Safety

Topical minoxidil side effects:

• Skin irritation and itching of the scalp
• Dandruff
• Temporary hair shedding
• Hypertrichosis, meaning unwanted hair growth where the solution runs or transfers, commonly the forehead and cheeks

Gupta et al. (2022). Journal of Dermatological Treatment

With low-dose oral minoxidil, the most common side effects are dose-dependent: unwanted body hair growth (hypertrichosis) and cardiovascular symptoms, which can include lightheadedness, a faster heartbeat and fluid retention with swelling in the ankles or face. A rarer, unpredictable reaction is fluid collecting around the heart (pericardial effusion).

Oral minoxidil has a short half-life of around four hours, but its blood pressure-lowering effect can last about 72 hours. Doses for male pattern hair loss usually start at 1 to 5 mg a day, with 5 mg generally the maximum.

Gupta et al. (2023). Skin Appendage Disorders

Report swelling, breathlessness, chest pain or a racing heart to a physician rather than waiting for a scheduled check-in. Hair shedding may be noticed in the first weeks of treatment, and is generally considered a sign that follicles are shifting into a new growth phase. If shedding is heavy or does not settle, talk to your physician. Oral minoxidil is not recommended during pregnancy or breastfeeding.

Boosting Minoxidil: Tretinoin and Microneedling

Topical minoxidil has a favorable risk/benefit profile, which makes it the natural partner in combination plans. Pairing minoxidil and finasteride is covered above; the two options here make minoxidil itself work better.

Tretinoin is the most direct fix for the non-response problem above. In one study, applying topical tretinoin increased follicular sulfotransferase, and 43% of people initially predicted to be non-responders to minoxidil were converted to responders after five days of tretinoin.

Sharma et al. (2019). Dermatologic Therapy

Microneedling is thought to help mainly by improving penetration of medications like minoxidil into the scalp, alongside stimulating collagen, new blood vessels and growth factors.

Fertig et al. (2018). Journal of the European Academy of Dermatology and Venereology

Supporting Treatments

The four treatments below sit in a different evidence class from finasteride and minoxidil, and it is worth being clear about why they are still here. None of them will hold your hair on its own. What they offer is either a way to make the core treatments work better, as microneedling does by improving absorption, or a low-risk addition for people who want to do more, as ketoconazole shampoo does. Read them as additions to a routine that already has a DHT inhibitor in it, not alternatives to one.

Ketoconazole Shampoo (Nizoral) for Hair Loss

Ketoconazole is an anti-fungal medication used largely for skin infections like dandruff, seborrheic dermatitis, tinea, and tinea versicolor. It is used topically as a cream, shampoo, or solution.

Many hair loss communities also discuss it as an off-label adjunct or secondary treatment for male pattern hair loss, due to its potential anti-androgen and anti-inflammatory effects in addition to its antifungal properties, which can support overall scalp health. A review of topical antiandrogen therapies lists ketoconazole shampoo as a promising option for male pattern hair loss with minimal adverse effects.

Marks et al. (2020). American Journal of Clinical Dermatology

Because ketoconazole shampoo rarely causes significant side effects, it’s a low-risk therapy many add to their hair loss routine, being especially useful for patients who might also be suffering from skin infections at the same time. Most hair loss studies examine ketoconazole shampoo 2%, which is available by prescription only in the United States. The Nizoral brand is 1% strength and is available over the counter.

Overall, there is limited evidence showing increased hair shaft diameters and regrowth in humans using topical ketoconazole treatment. A 2020 systematic review found only five human studies, with 318 participants in total, which reported increased hair shaft diameter and clinical improvement, and called for randomized trials. Core treatments finasteride and minoxidil should remain as first-line treatments for AGA given the quality of data, results, and FDA approval.

Fields et al. (2020). Dermatologic Therapy

Microneedling

Microneedling is a relatively new minimally invasive procedure used as an adjunctive therapy for androgenetic alopecia. Fine needles puncture the top layer of the skin, which is used to induce collagen formation, new blood vessels and growth factor production, and to help medications penetrate. The evidence doesn’t show it is better than standard treatments on its own, but it shows promise in combination.

Fertig et al. (2018). Journal of the European Academy of Dermatology and Venereology

Two meta-analyses of randomized trials agree that microneedling combined with topical minoxidil increases hair count more than minoxidil alone. A 2023 analysis of 10 trials (466 patients) found no serious adverse events, though its improvement in hair diameter fell just short of statistical significance.

Abdi et al. (2023). Archives of Dermatological Research

A larger 2025 analysis of 12 trials (631 patients) did find a significant improvement in diameter. Needle depth, treatment length and device type did not significantly change the effect on hair count, and side effects were more frequent with the combination than with minoxidil alone, but were generally mild.

Ahmed et al. (2025). Archives of Dermatological Research

More research is needed to find the best protocol, and it’s important to be aware that the device itself can alter the variables as well. Automated devices offer more consistent control over depth than manual rollers, which depend more on the user.

Platelet-Rich Plasma (PRP)

Platelet-rich plasma (PRP) is another potential adjunct treatment option for AGA, sourced from your own body. It’s prepared from a blood draw, spun in a centrifuge to concentrate the platelets, and then injected into the scalp. The preparation methods are not standard, and even then, because it’s patient-derived, there is inherent variability.

A 2022 meta-analysis found PRP increased hair density and hair thickness in people with AGA and lacked serious adverse effects, while calling for better-designed trials to optimize protocols.

Evans et al. (2022). Journal of Dermatological Treatment

A 2024 meta-analysis of 10 trials confirmed the increase in density but found no significant difference in hair diameter, so the thickness benefit is less certain.

Li et al. (2024). Aesthetic Plastic Surgery

One major thing to keep in mind is clinic safety overall, especially in the context of dealing with blood, to prevent transmission of disease. Stick to regulated, licensed medical professionals and ask about the safety standards.

Low-Level Laser Therapy (LLLT)

Low-level laser therapy uses specific wavelengths of light that are proposed to stimulate follicles and promote growth. A handheld laser comb is FDA-cleared for androgenetic alopecia.

Adil & Godwin (2017). Journal of the American Academy of Dermatology

In one meta-analysis of 11 randomized trials, laser therapy significantly increased hair density compared with sham devices, lower treatment frequency was more effective than higher frequency, and both comb- and helmet-type devices showed benefit.

Liu et al. (2019). Lasers in Medical Science

In a systematic review of 11 studies (680 patients), nine found significant improvements in hair count or density, while patient satisfaction was positive but less pronounced than the measured results.

Afifi et al. (2017). Lasers in Surgery and Medicine

Setting reasonable expectations is key. It might be a good alternative for those not interested in medication or surgery.

Building Your Hair Loss Treatment Routine

Everything above is the menu. This is how the pieces get assembled into a plan, now that all of them have been introduced.

Base Routine

The foundation of a solid hair loss routine includes a solution to the core problem driving the hair loss (DHT), a growth stimulant to boost the appearance, and supporting therapies to keep the scalp healthy and synergistically help the two core treatments.

Ideally, you combine all three categories and tailor the strengths and types of medications in each category to support your goals, risk tolerances, history, and genetics. Someone with advanced loss who wants to make a full recovery is going to have a very different routine compared to someone just noticing early loss wanting to maintain healthy hair over the long term.

So think of it like this:

1. Androgen solution. Usually a DHT inhibitor or antiandrogen, which focuses on the root cause of androgenetic alopecia. Some men regrow hair from this alone, which is a great outcome; more often it maintains what you have or slows the loss. DHT inhibitors like finasteride fit the majority of cases, with dutasteride being the strongest option.
2. Growth stimulator. For many, especially those with more aggressive or later stages of hair loss, a growth stimulant, most commonly minoxidil, helps improve the appearance of hair thickness by boosting growth. It doesn’t fight the underlying issue of DHT, and hair will still be attacked if you ignore DHT, but it’s a great way to boost appearance on top of your DHT blocker.
3. Supporting therapies. For this category, think of things like microneedling, ketoconazole, low-level laser therapy, tretinoin, or PRP treatments. This category doesn’t have as strong of evidence compared to the two core treatments, but these can be useful in some cases for enhancing efficacy of the core treatments, supporting the overall scalp environment, or boosting hair health.

That structure mirrors the evidence: combining finasteride with topical minoxidil outperformed either on its own in randomized trials.

Chen et al. (2020). Aesthetic Plastic Surgery

People like to overcomplicate it, and there are innovative treatments to explore within these categories, but this is the base of any serious routine aiming for hair recovery and maintenance.

Assembled, two common shapes look roughly like this.

Category	Early loss, goal is maintenance	Advanced loss, goal is recovery
Androgen solution	oral finasteride 1 mg daily, or topical finasteride if oral is not tolerated	oral finasteride 1 mg daily, or dutasteride 0.5 mg daily for a stronger effect
Growth stimulant	often none at the start, or topical minoxidil if density is already visibly down	topical or low-dose oral minoxidil
Supporting therapies	ketoconazole shampoo, since it is low risk and easy to keep up	microneedling to raise topical response, ketoconazole shampoo, LLLT if medication alone is not enough

Those are illustrations of how the three categories fit together, not recommendations. Which molecule, which delivery method and which dose belong in your plan is a decision for the physician who has seen your history and your labs.

This is why Happyglow offers a range of treatments rather than one product, and why care should run through a licensed physician: there are a lot of moving parts, and the plan should be built for you.

Decision Framework

Now that you’ve seen the options at a high level, you might be wondering about who uses what, when, and why.

It comes down to a handful of variables, and they rarely all point the same way.

Variable	Points toward a lighter routine	Points toward a more aggressive one
Stage and pattern	Norwood 1-2, recession only	Norwood 4+, or diffuse thinning
Trajectory	slow loss over ten years	rapid loss over two years
Age	50 with stable density elsewhere	18 and actively thinning
Goal	maintain what you have	recover what you have lost
Risk tolerance	unwilling to accept any sexual side effect risk	willing to trade a small risk for density
Household	pets, young children or a pregnant partner favor oral over topical	no exposure constraints
Effort	will not apply a topical every day	happy with a daily routine
Budget	oral generics tend to cost less	compounded topicals and transplants cost more

Those vectors interact, which is why two men at the same Norwood stage can reasonably land on very different plans.

A man who tolerates oral finasteride might also choose oral minoxidil over any topical because he has pets or a pregnant partner, both of which raise exposure risks with topicals.

Side effects are a spectrum of their own, relating to each individual and treatment plan. A guy might not tolerate oral finasteride but is fine using topical. Another might be fine on dutasteride and get strong results with no side effects. A third man might be taking oral finasteride and notice some mild changes regarding sexual satisfaction and erectile quality but decides it’s manageable and worth the trade-off. A fourth might temporarily experience side effects while adjusting but is fine after.

Weigh risk against time, too. Don’t compare the risks with the hair you have now; compare them with what your hair may look like in 5, 10 or 15 years on your current trajectory. It’s easy to avoid the risk of side effects when you have thick hair and only a Norwood 1 stage of recession, but at Norwood 4 with diffuse thinning you might feel very different.

Cost is a factor worth discussing. Things like oral finasteride and minoxidil are generally inexpensive generics, while the combination topicals are off-label and compounded individually, and transplants are a significant expense.

You can also iterate your plan of action over time: starting out with a lower load plan, and then increasing if needed after monitoring.

There’s no easy answer, which is what Happyglow physicians are for: an informed decision based on your goals, from a range of hair loss medications.

Discontinuing and Troubleshooting

When something isn’t working, change one variable at a time so you can tell what helped.

Side effects. With your prescriber, options include waiting, because some side effects are transient and only happen at the early stages, reducing dose or frequency, trying different delivery methods, switching molecules, or stopping entirely.

Efficacy. Has it been long enough for full effects? Early shedding is expected. Is the diagnosis right, and have you checked labs and ruled out telogen effluvium? Do a compliance check: have you been following your schedule honestly? With minoxidil, you have options to increase efficacy.

Stopping. Minoxidil’s results are maintained only while you use it, and the finasteride label notes reversal within 12 months of stopping. Treatment is designed to be indefinite.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

Lifestyle: Diet, Stress, Smoking, Creatine and TRT

A lot of people discuss diet, sleep, and stress as factors in androgenetic alopecia. These things might impact shedding in the short term, or trigger temporary shedding known as telogen effluvium, but that hair usually comes back if the underlying follicles are healthy. Inflammation, hormones, stress, nutritional deficiency and poor sleep can all push follicles from growing into resting. Lifestyle changes will not reverse loss driven by genetic sensitivity to DHT.

Natarelli et al. (2023). Journal of Clinical Medicine

With diet, there is one note to discuss: creatine. A lot of fear is spread around creatine causing or accelerating hair loss due to one small study showing an increase in DHT. A 12-week randomized trial in resistance-trained men directly tested this and found no differences in DHT, the DHT-to-testosterone ratio or any hair measure between creatine and placebo.

Lak et al. (2025). Journal of the International Society of Sports Nutrition

On the same fitness theme, TRT and anabolic steroids come up a lot. Testosterone is the raw material 5AR converts into DHT, so raising it can increase the risk of hair loss for those who are genetically susceptible, and some men who were fine at natural levels notice loss when their levels go up. For men on testosterone who want to protect their hair, the usual approach is the same as for anyone else, a DHT inhibitor like finasteride or dutasteride, and combining the two is a decision for the physician managing both.

US Food and Drug Administration (2022). Propecia (finasteride) prescribing information

The same goes for hats, shampoos, dyes, brushing, styling and hard water. It is easy to see the appeal: those are all things you can control, and androgenetic alopecia is not. But pattern loss is driven by genetic predisposition and androgens, not by how you treat your hair day to day. The real answer is to get an assessment with a professional and decide whether you want to treat the condition.

The pull toward natural supplements, or toward minoxidil on its own, comes from the same place: it feels like less hassle and less risk right now. The trade-off is that it makes maintenance and regrowth much harder later, when there is less hair left to work with.

A major lifestyle factor that does need to be discussed is smoking. In a survey of 740 men aged 40 and over, smokers had higher odds of moderate or severe pattern hair loss after accounting for age and family history, and the risk was higher in heavy smokers of 20 or more cigarettes a day.

Su & Chen (2007). JAMA Dermatology

Other Treatments

Innovation in medicine is a good thing, and the current system could do much better, but there’s a fine line between calibrated innovation and being reckless with unproven treatments, or on the other hand, using or promoting completely ineffective treatments.

Emerging Treatments

There are a few promising hair loss treatments in the research and development pipeline, but before you get too excited you need to know they aren’t officially available yet. Anyone selling them now is doing so unofficially, and you have no way of knowing what you’re actually getting.

The leading contender is clascoterone, sold as Winlevi (a 1% cream approved for acne) and in development as Breezula (a higher-strength solution for hair loss). It is approved for the treatment of acne in the US, and a review of topical antiandrogens described it as a promising treatment for hair loss with minimal adverse effects.

Marks et al. (2020). American Journal of Clinical Dermatology

In December 2025, the manufacturer announced topline results from two phase 3 trials of a 5% solution in 1,465 patients, reporting that both met their primary endpoint on hair count with side effects similar to the placebo vehicle. Those results have not yet been published in a peer-reviewed journal.

Cosmo Pharmaceuticals (2025). Phase III topline results for clascoterone 5% solution

The main safety question is suppression of the hypothalamic-pituitary-adrenal (HPA) axis. In a study of the acne cream, it was seen in 5% of adults and 9% of adolescents after two weeks, and all returned to normal within four weeks of stopping.

US Food and Drug Administration (2020). Winlevi (clascoterone) prescribing information

Earlier in the pipeline are pyrilutamide (KX-826), a nonsteroidal antiandrogen, and GT-20029, an androgen receptor degrader, both from Kintor Pharmaceuticals, and suvomipic (PP405), which targets follicle metabolism rather than androgens.

Wikipedia (2026). List of investigational hair loss drugs

In summary, I would expect Breezula to offer some level of benefit as a supporting treatment in combination with the standard DHT inhibitors (finasteride, dutasteride) and growth stimulant medications (minoxidil). Suvomipic is also interesting, especially with its unique approach and mechanism. In the end, time, data, and further research trials will tell.

Hair Growth Supplements and Other Overhyped Treatments

Treatments with weak evidence get discussed a great deal, including by people with large followings and real credentials. The standard recommendations are less exciting, and usually more effective.

Recommending DHT inhibitors like finasteride or dutasteride means talking about side effects, which is a harder conversation than recommending an oil. The easier conversation is more pleasant for everyone involved, and it does not grow hair.

Supplements deserve a fair hearing, though. A 2023 systematic review in JAMA Dermatology found that some, including certain branded formulas, zinc and pumpkin seed oil, showed potential benefit in the best available studies, with rare and mild side effects. But those studies were mostly small, none compared a supplement head to head with finasteride or minoxidil, and the authors called for larger trials against active treatments.

Drake et al. (2023). JAMA Dermatology

Biotin, the best-known hair supplement, has much less behind it. In the highest-quality study available, biotin performed no differently from placebo for hair growth, and a 2024 review concluded its use as a hair supplement is not supported by high-quality studies.

Yelich et al. (2024). Journal of Clinical and Aesthetic Dermatology

Rosemary oil is the other one you will see everywhere. Most of the attention traces back to a single 2015 trial of 60 people that found it comparable to 2% minoxidil, the lower over-the-counter strength, over six months.

Natarelli et al. (2023). Journal of Clinical Medicine

If you’ve tried one of these, we aren’t judging you! They’re cheap, marketed hard, and they promise the thing you want without the part you’re most worried about. But for most men with hair loss, the cause is androgenetic alopecia, and no supplement or oil has been shown to do what the DHT inhibitors and minoxidil do.

For commentary on how bad science is used to promote ineffective natural treatments, Lab Muffin Beauty Science has a great video series discussing rosemary oil for hair loss.

• Rosemary oil for hair loss? How to spot bad science
• Rosemary oil and hair loss Pt 2: Scam like a scientist

Unproven Treatments

While ineffective treatments like supplements are usually harmless, there is another category to be careful of: unproven treatments. I’m talking about compounds that have little human research data, no safety trials, and aren’t approved.

Take RU-58841, for example; it’s a compound that was in research at one point, but was never brought to market. The fact that development stopped will immediately trigger a thought in some people’s heads about getting it through unofficial sources. When you get a compound through unofficial, unlicensed sources, you have no professional guidance, no quality assurance, and nobody being held accountable if something goes wrong.

You have no way to confirm that what arrived is what was advertised, that it was produced under conditions that control for contamination, that your dose is right, or what it interacts with. The point is that for a lot of these compounds, you can’t make any claims because the data doesn’t exist.

On the less intense side, regenerative treatments like exosomes and stem cells are interesting but remain experimental. The FDA has warned about serious adverse events in patients treated with unapproved products marketed as containing exosomes. Until more data exists, these cannot be recommended.

US Food and Drug Administration (2019). Public safety notification on exosome products

Cosmetic Solutions

Medication changes what your scalp is doing. The options below change how it looks, which is a separate question and sometimes the more useful one. They range from surgical and permanent to something you wash out the same evening, and they are not in competition with treatment: a transplant in particular depends on medication holding the hair around it. Several also work best in combination, which is why men who have accepted a shorter style often end up somewhere in this section rather than in the previous ones.

Hair Transplants: How Do They Work?

Hair transplants (sometimes called hair implants) are surgical procedures that transfer DHT-resistant hair follicle grafts from the donor site (usually the side or back of the head) to the balding recipient site. This works because of donor dominance: transplanted hair keeps the genetic characteristics of where it came from.

Most reputable hair transplant surgeons expect you to have started or been on hair loss medication, specifically DHT inhibitors like finasteride or dutasteride. This is because if you get a hair transplant without blocking DHT, your natural hair loss is likely still being attacked by DHT, so if that continues to thin while the transplanted hair doesn’t, the result won’t look good. Concurrent medical management and thoughtful hairline design are two of the main reasons transplant results have improved.

Core variables that influence the feasibility and results of a hair transplant include age, medication response, expectations, severity and pattern of hair loss, donor hair quality, hair type, and surgeon skill. For example, if your hair loss has consistently hovered around a Norwood 4, you might be more comfortable only filling in the front temple and hairline areas to frame the face better, while someone with diffuse thinning across the entire scalp may have to go for a more aggressive plan.

The two most popular methods of hair transplants are FUE and FUT, and both are considered state of the art.

Follicular Unit Extraction (FUE):

• Harvests individual follicles
• Leaves small, scattered scars rather than a line

Follicular Unit Transplantation (FUT):

• Harvests a strip of scalp
• Leaves a linear scar at the donor site

Queen & Avram (2025). Dermatologic Surgery

Like any surgery, transplants carry a risk of complications at both the donor and recipient sites, which is why the experience of the surgeon matters.

Khatib et al. (2025). Aesthetic Plastic Surgery

Choosing a surgeon is harder than choosing medication, because even the most well-known surgeons are not perfect. In line with the theme of this article, though, the cheap, fast, and convenient option often leads to worse outcomes. Generally, surgeons of higher quality come with a higher price tag, although total cost depends on the number of grafts required and technique used.

Scalp Micropigmentation, Hair Fibers and Hair Systems

Camouflage options for hair loss range from concealing powders and fibers to partial or full hairpieces, and surgical tattooing of the scalp, each with its own trade-offs.

Saed et al. (2016). International Journal of Women’s Dermatology

Scalp micropigmentation (SMP) is a cosmetic procedure that uses needles to place pigment into your scalp. It’s essentially a tattoo designed to mimic the close shave look, or to add an illusion of density underneath thin hair. SMP fits well with diffuse thinning, buzzcut, or fully shaved styles. Similar to hair transplant surgeons, the quality of the artist will make a huge difference in outcome. Don’t cheap out on a quick solution, and consider what you would want to look like as you age: subtle density with natural hairline placement almost always looks better than wildly high density. The goal is to frame your face and add density, not achieve perfection.

Hair fibers are cosmetics made with keratin (hair protein) which stick to your existing hair to make your hair appear thicker. If you have thin spots or diffuse thinning, this category of product can provide a meaningful temporary boost in appearance.

Hair systems are a more involved solution. A mesh or polymer layer is combined with natural or synthetic hair, which is then applied to your scalp with adhesive or tape. Hair systems are highly customizable, and nearly undetectable when done right. Wigs and hair extensions may also be considered.

Haircuts and Styles

The cut and style of hair can drastically change the appearance, which is especially useful for those facing hair loss. Styles like buzzcuts, fringes, and buns can help, especially when paired with things like hair fibers. Of course, shaving is always an option: the bald look is cleaner than the balding look, especially for those in transitory periods of a hair recovery journey.

How to Get Hair Loss Treatment Online

If you’re wondering how or where to get hair loss medication, Happyglow connects you with US-licensed physicians who decide whether treatment is right for you, entirely online.

1. Start your visit. Answer a few questions about your health and goals (~5 min).
2. A physician reviews. They determine which treatments are appropriate for you, or recommend a better fit.
3. Delivered to your door. If approved, your prescription ships free.

See if hair loss treatment is right for you→

Not approved? You’re refunded in full.