Hair loss is the kind of problem that makes men reach for explanations. Too much testosterone, right? Actually, no. And that misunderstanding leads a lot of blokes down the wrong path, throwing money at the wrong solutions or avoiding legitimate treatments out of fear.
Let me walk you through what's actually happening, what works, and what doesn't.
The Real Mechanism: It's Not Just Testosterone
Androgenetic alopecia—male pattern baldness—requires three things:
- Testosterone (which you have)
- The enzyme 5-alpha reductase (which converts testosterone to DHT)
- Genetically sensitive hair follicles (which is the key variable)
The critical bit: testosterone itself doesn't cause hair loss. The problem is DHT, and more specifically, whether your hair follicles are genetically predisposed to shrink in response to DHT.
This is why men with genuinely high testosterone don't necessarily lose more hair than men with normal levels. What matters is receptor sensitivity—a trait you inherit. If your follicles have more DHT receptors, or those receptors are more reactive, you're at risk. If they're not sensitive, you can have high testosterone and a full head of hair.
Your barber didn't lose hair because he lifted more; he lost it because his genetics loaded the gun that his hair follicles were holding.
Why This Matters for Treatment
Understanding the actual mechanism tells you why certain treatments work and others don't:
- Treatments that block DHT production (finasteride, dutasteride) can work because they reduce the signal causing follicle miniaturisation
- Treatments that increase blood flow (minoxidil) can work through a different pathway, partially independent of DHT
- Treatments that merely block DHT receptors (like spironolactone, used off-label) are less effective because they're blocking at the wrong place in the cascade
The Norwood Scale: Where Are You?
The Norwood scale is how dermatologists classify male pattern baldness from mild (Norwood I—no noticeable loss) to severe (Norwood VII—horseshoe pattern, sides and back only). Knowing your stage helps you understand the likely speed of progression and whether you can realistically regrow or just stop further loss.
Most treatments work better the earlier you intervene. Norwood I-II? You can potentially regrow. Norwood IV-V? You're likely looking at maintenance. Norwood VI-VII? Medical treatment alone won't restore significant density; transplant is the next step.
Treatment Options, Ranked by Evidence
1. Finasteride 1mg (Propecia, generic)
The evidence: This is the gold standard. Finasteride inhibits type II 5-alpha reductase, reducing DHT by roughly 70% in the scalp. Studies show that after 1-2 years, roughly 80% of men see either regrowth or halting of loss. After 5 years, about 1 in 3 men see noticeable regrowth.
The honest bit: Post-finasteride syndrome (PFS) is a documented phenomenon. A small percentage of men (estimates range from 1-3% in clinical practice to higher in online forums) report persistent sexual dysfunction, brain fog, or mood changes after stopping the drug—sometimes lasting months or years. The mechanism is unclear. The FDA and EMA are investigating, but the evidence isn't conclusive.
Real talk: For most men, finasteride is safe and effective. But you need to know this exists. If you have any history of sexual or mood issues, discuss this with your doctor before starting. If you develop side effects, they usually resolve within weeks of stopping.
Cost: ~£15-20/month generic (NHS rarely covers this; private provision is standard)
2. Minoxidil Topical (Rogaine, generic)
The evidence: Minoxidil works through a different mechanism—it's a potassium channel opener originally developed for blood pressure. On the scalp, it extends the anagen (growth) phase of the hair cycle and may increase blood flow to follicles. Studies show roughly 45-50% of men see hair regrowth; effects are modest but real.
The key advantage: It's not hormonal. No DHT involvement, no sexual side effects, no systemic absorption to speak of. You can use it independently or alongside finasteride (they work synergistically).
The drawback: It works only while you're using it. Stop, and you lose the benefit within weeks. And it requires discipline—twice daily application, 5% strength, for months before you see results.
Cost: ~£10-20/month
3. Combination Therapy (Finasteride + Minoxidil)
The evidence: Better together than either alone. If you're serious about regrowth, this is the standard approach. Finasteride stops the DHT-driven loss; minoxidil extends the growth phase. The combination halts loss in ~95% of men and produces noticeable regrowth in 50-60%.
Cost: ~£25-40/month total
4. Low-Level Laser Therapy (LLLT / Red Light)
The evidence: Modest. Some studies show improvements in hair density, but effect sizes are small and inconsistent. The mechanism is thought to involve mitochondrial stimulation, but we're not certain. A Cochrane review concluded the evidence is "limited."
The verdict: Not a first-line treatment. If you've responded well to finasteride and minoxidil and want to optimise further, LLLT might add a small benefit. But don't expect it to do heavy lifting alone.
Cost: £500-2,000 for a decent home device, or clinic treatments at £30-50/session
5. Platelet-Rich Plasma (PRP)
The evidence: Limited. A few small studies show modest improvements, but we lack large RCTs. The proposed mechanism involves growth factors in concentrated platelets stimulating follicle stem cells.
The verdict: Experimental. Some dermatologists offer it; some think it's premature. Not established enough to recommend as a standard treatment.
Cost: £500-1,500 per session, typically 3-6 sessions required
6. Ketoconazole Shampoo (2%)
The evidence: Ketoconazole has mild 5-alpha reductase inhibition and anti-fungal properties. Studies show modest benefit, especially when combined with finasteride. It's a reasonable adjunct.
The verdict: Good supporting tool, not a primary treatment. Use alongside finasteride and minoxidil, not instead of them.
Cost: ~£10-15/month
What Doesn't Work
Saw palmetto (at standard doses) has been studied extensively and shows little evidence of efficacy for androgenetic alopecia. It's popular in supplements, but the data doesn't support it.
Scalp massage, nioxin shampoos, biotin supplements—these are unproven for hair loss. That doesn't mean they're harmful, but they're not evidence-based treatments.
Blocking DHT through diet (speculatively via phytoestrogens, reduced animal fat, etc.)—the evidence is absent. Your genetics load this gun; diet doesn't unload it.
Hair Transplantation: The Permanent Option
If medical treatments fail, plateau, or you just want density now rather than in 1-2 years, hair transplantation is a genuine option. Modern FUE (follicular unit extraction) techniques have a high success rate—70-90% of transplanted follicles survive and grow.
The reality: It's expensive (£5,000-15,000 for meaningful density), takes 6-12 months to see full results, and requires a skilled surgeon. But it's permanent; you're moving genetically resistant (usually from the back and sides) follicles to the front.
What to Do Right Now
- Photograph your hair now. Baseline documentation helps you assess whether treatments are actually working.
- Start finasteride + minoxidil if you're Norwood I-IV. The earlier you intervene, the better the results. Combine them for best effect.
- Get baseline blood work (testosterone, DHT, liver function) before finasteride—not because it's dangerous, but to have a reference point.
- Be realistic about timelines. Results take 3-6 months minimum. Judge after 6-12 months.
- Monitor for side effects. Most men tolerate finasteride fine. If you develop mood or sexual changes, discuss with your doctor immediately.
- If medical treatment plateaus, consider minoxidil 5% on the crown or LLLT as an adjunct, or plan for a transplant consultation.
Male pattern baldness is predictable, testable, and treatable. You won't regrow a full Norwood VII scalp with medication alone. But you can halt loss and often regain meaningful density if you intervene early with evidence-based treatments.
The only thing that shouldn't determine your choice is fear of testosterone. The hormone isn't the problem; your genes are. And you can work with that.
Recommended products: Finasteride and minoxidil are available via UK private clinics (Optimale, Hims UK, Keeps), your GP on private prescription, or as generics. LLLT devices available via Amazon or specialist vendors. Read reviews carefully; quality varies.