For your skin
The active in classic anti-dandruff and anti-Malassezia formulas. RCTs show it clears severe dandruff and seborrheic dermatitis on par with ketoconazole 2%; also useful in fungal acne and scalp folliculitis. The reason your medicated body wash actually works.
Want the science? Keep reading ↓Mechanism of action
Zinc-chelated pyrithione that disrupts fungal membrane transport (notably Malassezia spp.) and inhibits bacterial growth; depolarises microbial cell membranes by increasing intracellular copper to toxic levels. FDA-approved OTC antidandruff active.
Why we tier this strong
6 cited papers across 2 countries. Multiple positive efficacy results plus regulatory backing. Clears our published bar (Strong = 15+ studies with multiple randomized controlled trials (RCTs), or a single large longitudinal cohort).
Cited research
Turner GA, Matheson JR, Li GZ, Fei XQ, Zhu D, Baines FL. Enhanced efficacy and sensory properties of an anti-dandruff shampoo containing zinc pyrithione and climbazole. Int J Cosmet Sci. 2013;35(1):78-83. — clinical evaluation of the zinc pyrithione dual-active shampoo demonstrated superior anti-dandruff efficacy that was retained during a regression phase.
Reeder NL, Xu J, Youngquist RS, Schwartz JR, Rust RC, Saunders CW. The antifungal mechanism of action of zinc pyrithione. Br J Dermatol. 2011;165 Suppl 2:9-12.
Berger RS, Fu JL, Smiles KA, Turner CB, Schnell BM, Werchowski KM, Lammers KM. The effects of minoxidil, 1% pyrithione zinc and a combination of both on hair density: a randomized controlled trial. Br J Dermatol. 2003;149(2):354-362. — 1% pyrithione zinc shampoo produced a modest, sustained improvement in hair count over the 26-week treatment period.
Pierard-Franchimont C, Goffin V, Decroix J, Pierard GE. A multicenter randomized trial of ketoconazole 2% and zinc pyrithione 1% shampoos in severe dandruff and seborrheic dermatitis. Skin Pharmacol Appl Skin Physiol. 2002;15(6):434-441.
Saple DG, Ravichandran G, Desai A. Evaluation of safety and efficacy of ketoconazole 2% and zinc pyrithione 1% shampoo in patients with moderate to severe dandruff--a postmarketing study. J Indian Med Assoc. 2000;98(12):810-811. — a reduction of >90% in dandruff was seen for all scalp areas individually and collectively versus baseline.
FDA OTC Final Monograph, 21 CFR Part 358 Subpart H — Dandruff, Seborrheic Dermatitis, and Psoriasis Drug Products for OTC Human Use; pyrithione zinc listed at 0.3-2% as a Category I active.
Sources: PubMed · KCI · J-Stage · CNKI · Wanfang · SFD · MFDS · Cochrane · SCCS · CIR. Every entry points to a specific document. See methodology for what each outcome label means.