The ingredient, explained

Zinc Pyrithione

Research examined ZINC PYRITHIONE under the stated study conditions.

AntidandruffAntiseborrhoeicHair conditioningPreservative

Explore connections

Ingredient guide

What it is and what it does

Pyridine-2-thiol-1-oxide, zinc complex -2:1-

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Antidandruff: A technical role associated with controlling dandruff.
Antiseborrhoeic: A technical role associated with controlling sebum production.
Hair conditioning: Improves cosmetic hair properties such as softness, shine or combability.
Preservative: Helps inhibit microbial growth in the cosmetic product.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human topical research

Pooled trial data showed greater dandruff reduction with 1% zinc-pyrithione shampoo than non-antidandruff shampoo, with a larger response in males.

What this does not tell us

Secondary pooled analysis of 17 studies rather than one new trial;2088 participants in efficacy pool, 143 separateparticipants in lipid/protein analysis. Formulation and scalp outcomes limit generalization; no current regulatory claims.

Sources for this summary. PubMed 30447108 ↗

Research review checked Oct 1, 2026

Read exact local candidate abstracts first; select identity-relevant papers; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.