Every Hair Loss Treatment, Ranked: What Actually Works in 2026

The hair loss treatment industry is a minefield of exaggerated claims, unproven supplements, and expensive procedures that work on a spectrum from "well-documented" to "basically a placebo." If you're losing hair, you deserve an honest ranking based on what the evidence actually shows.

Here it is. No supplement company sponsorships. No trying to sell you a $200 shampoo.

What Causes Male Pattern Hair Loss

Understanding the mechanism helps evaluate treatments logically. Androgenetic alopecia (male pattern baldness) is caused by DHT (dihydrotestosterone) — a derivative of testosterone — binding to receptors in genetically susceptible hair follicles. Over time, DHT miniaturizes these follicles: thicker terminal hairs become thinner vellus hairs, eventually shrinking to nothing.

The process is slow (typically years to decades) and follows predictable patterns (receding hairline, crown thinning, or both). The earlier you intervene, the more you can preserve.

Tier 1: Proven, High Efficacy

### Finasteride (1mg daily) Mechanism: Inhibits 5-alpha reductase Type II, the enzyme that converts testosterone to DHT. Reduces scalp DHT by ~60-70%.

Evidence: Two-year studies show 83% of men on finasteride maintain or improve hair count vs 28% on placebo. Five-year data shows continuous improvement, though at a slower rate after year 1.

What it does well: Halts progression in the vast majority of men. Produces meaningful regrowth in many (particularly crown thinning). Works best in men 18-40 with earlier-stage loss. Gold standard for Norwood II-IV.

Side effects: The famous sexual side effects (reduced libido, erectile dysfunction, reduced ejaculatory volume) occur in approximately 2-3% of men based on blinded trial data — much lower than reported in open-label contexts (likely due to nocebo effect). Post-finasteride syndrome (persistent side effects after discontinuation) is real but extremely rare. The sexual side effect risk is overstated in online discourse, but real and worth knowing.

Timeline: Minimum 6 months to assess efficacy. Full effects at 12-18 months.

Verdict: First-line treatment for genetic hair loss. If you have scalp hair worth preserving and are concerned about DHT-driven loss, finasteride should be your starting point.

### Minoxidil (Topical 5%, or Oral 0.5-5mg) Mechanism: Not fully understood. Dilates blood vessels and opens potassium channels. Prolongs the anagen (growth) phase of the hair cycle. Does NOT affect DHT.

Evidence: Topical 5% minoxidil vs placebo shows significant hair regrowth at 4-6 months. Oral minoxidil at 0.5-2.5mg shows superior results in multiple studies, with better systemic absorption.

What it does well: Works across all areas of the scalp. Good for diffuse thinning. Can produce meaningful regrowth — often more visible density improvement than finasteride in the short term.

Side effects (topical): Scalp irritation, initial shedding (temporary — follicles resetting from telogen to anagen), hypertrichosis (unwanted facial hair in women, sometimes men). Requires daily application.

Side effects (oral): Fluid retention, low blood pressure, palpitations (at higher doses). At 0.5-2.5mg doses, most men tolerate it well. Blood pressure monitoring recommended.

Timeline: 3-6 months for visible effect. Ongoing use required — stopping means losing gains within 3-6 months.

Verdict: Highly effective, especially combined with finasteride. The combination works synergistically — finasteride prevents DHT-driven miniaturization, minoxidil independently stimulates growth. Oral minoxidil increasingly preferred for efficacy and convenience over topical.

Tier 2: Proven, Moderate Efficacy or Specific Indications

### Dutasteride (0.5mg daily) Mechanism: Inhibits both Type I and Type II 5-alpha reductase. Reduces DHT by ~90% vs finasteride's 60-70%.

Evidence: Head-to-head trials show dutasteride superior to finasteride for hair regrowth. Significant in men with earlier loss or strong family history.

What it does well: More potent DHT suppression. May work in finasteride non-responders. Worth considering for aggressive loss patterns.

Side effects: Same profile as finasteride, potentially more pronounced (higher DHT suppression). Half-life of 5 weeks vs finasteride's 6-8 hours — takes months to fully clear if discontinued.

Verdict: Effective second-line option if finasteride isn't producing adequate results. More potent, but the persistence in the body means side effects take longer to resolve if they occur. Most physicians try finasteride first.

### Ketoconazole Shampoo (2%) Mechanism: Antifungal with mild anti-androgenic properties. Reduces scalp inflammation, which exacerbates follicular miniaturization.

Evidence: Studies show 2% ketoconazole shampoo produces modest hair density improvements comparable in some metrics to minoxidil. Most studies are adjunctive (used alongside primary treatments).

Verdict: Good adjunct to finasteride + minoxidil. Low risk profile. Probably won't produce dramatic results alone but adds something to the stack. Use 3x/week, leave on 2-3 minutes.

Tier 3: Real but Limited Evidence

### Low-Level Laser Therapy (LLLT) Mechanism: Photobiomodulation — red light stimulates mitochondrial activity in hair follicle cells.

Evidence: FDA-cleared (not FDA-approved — different standard). Studies show modest increases in hair count. Effect size is generally smaller than finasteride or minoxidil. Most effective in earlier-stage loss.

Verdict: A legitimate adjunct, not a primary treatment. Best for men who can't use finasteride (contraindication, personal preference) and want additional options beyond minoxidil. Devices are expensive. Requires consistent use (20 minutes, 3x/week typically).

### Platelet-Rich Plasma (PRP) Mechanism: Blood drawn, spun to concentrate growth factors, injected into scalp. Growth factors stimulate follicular activity.

Evidence: Multiple small studies show efficacy. Effect size is real. Quality of evidence is lower than finasteride/minoxidil (smaller trials, less long-term data).

Cost: $1,500-3,000+ per session; typically 3-4 sessions initially, maintenance every 6-12 months.

Verdict: Probably works. Expensive. Good option for people who have optimized the Tier 1/2 stack and want additional tools, or who have specific contraindications to medications.

Tier 4: Mostly Marketing

### DHT-blocking shampoos and "hair growth" shampoos Shampoos rinse off in 60-120 seconds. Active ingredients don't penetrate the follicle at meaningful concentrations. Any efficacy is marginal at best. The ketoconazole shampoo exception is real — but generic 2% ketoconazole is $15 at Costco, not a $80 "hair growth system."

### Biotin, collagen, marine protein supplements Biotin deficiency causes hair loss. Biotin supplementation reverses deficiency-related loss. Most men are not biotin deficient. In non-deficient people, biotin supplementation does not improve hair growth. Same story for collagen and marine protein supplements — compelling marketing, weak evidence, no DHT mechanism.

### Caffeine-infused shampoos, saw palmetto products Saw palmetto has weak in-vitro evidence against 5-alpha reductase. Topical application in shampoos doesn't work at concentrations used. Oral saw palmetto: small trials show modest effect, far weaker than finasteride, not worth the cost over proven options.

The Optimal Stack (2026)

For most men with androgenetic alopecia starting to address hair loss proactively:

1. Finasteride 1mg daily (or dutasteride 0.5mg if more aggressive intervention desired)
2. Oral minoxidil 1-2.5mg daily (or topical 5% if preference/tolerability)
3. Ketoconazole 2% shampoo 3x/week

This combination addresses the hormonal cause (finasteride), independently stimulates growth (minoxidil), and reduces scalp inflammation (ketoconazole). The synergy between finasteride and minoxidil is clinically documented.

When to Consider a Hair Transplant

Hair transplants (FUE or FUT) are surgical rearrangement of existing follicles from donor zones (back/sides of head, which aren't DHT-sensitive) to recipient zones (top/crown). They're effective and permanent — but they're redistribution, not regeneration.

Consider a transplant when: - You've been on finasteride + minoxidil for 12+ months with stabilization - You've lost significant ground you want to restore in density - Your loss pattern is stable enough to plan recipient zones - You're prepared for 12+ months for full results

Don't transplant without finasteride: Hair transplants are effective, but native follicles will continue miniaturizing without treatment. Men who get transplants without medication often find the transplanted hair looks great while native hair continues thinning, creating an odd pattern requiring further intervention.

Marrow's Hair Loss Protocol

Marrow's hair loss treatment starts with a physician consultation that evaluates your loss pattern, family history, and treatment goals. We prescribe finasteride and/or dutasteride with appropriate monitoring, and discuss minoxidil options as part of a complete protocol.

The intake takes 15 minutes. If hair loss treatment is right for you, medication ships to your door within days. No derm appointment required.