In short
- Look for: ketoconazole, caffeine, saw palmetto, niacinamide, mild surfactants.
- Avoid: heavy silicones (dimethicone) that mask thinness by weighing hair down.
- Rotate two shampoos: one medicated (ketoconazole 2x/wk), one gentle daily.
- Shampoo is a small lever — real thinning needs medical treatment alongside.
The best shampoo for thinning hair isn't a magic bullet — but the right shampoo supports a hair loss protocol; the wrong one undermines it. Here's what London trichologists recommend.
What to look for in the actives list
- Ketoconazole — mild anti-androgenic effect (Nizoral).
- Caffeine — modest follicle stimulation (Alpecin, Plantur 39).
- Saw palmetto — DHT-reducing evidence in vitro.
- Niacinamide — improves scalp barrier.
- Rosemary extract or oil — mild growth effect.
What to avoid
Heavy silicones that coat and weigh down hair (they mask thinness temporarily then cause build-up). Sulfates in daily use (fine 2x weekly; too harsh daily). Fragrance-heavy shampoos on sensitive scalps.
The London-trichologist rotation
Two shampoos on rotation: (1) Nizoral 2% or a caffeine shampoo 2–3 times weekly; (2) a gentle sulfate-free daily shampoo like Vichy Dercos or Klorane for the other days. Simple, evidence-supported, sustainable.
Shampoo alone doesn't regrow hair — but the wrong shampoo can quietly undo the treatments that would.
Frequently asked
Common questions
Do 'volumising' shampoos actually thicken hair?+
They coat the shaft and create the illusion of body. They don't affect follicle biology.
Is dry shampoo bad for thinning hair?+
Occasional use is fine. Daily use over months clogs follicles and inflames the scalp.
Should I wash more or less if I'm thinning?+
Same as before — thinning is a follicle problem, not a wash-frequency problem.
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