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Quick answer: Lead acetate carries the heavier risk profile. Lead acetate is banned in the EU and allowed in the US; Zinc pyrithione is banned in the EU and allowed in the US.
| Property | Lead acetate | Zinc pyrithione |
|---|---|---|
| EU status | Banned | Banned |
| US status | Allowed | Allowed |
| Risk level | high | medium |
| Banned in | European Union | European Union |
| Restricted in | — | — |
| Category | heavy metal | cmr |
| Where it hides | progressive hair dye, men's hair color | anti-dandruff shampoo, anti-acne products |
Lead acetate is a lead compound used in progressive darkening hair dyes.
Zinc pyrithione is an antifungal and antibacterial active in dandruff shampoos.
Lead acetate: Lead is a potent neurotoxin with no safe level. Banned in EU cosmetics; the US FDA revoked its authorization in 2018.
Zinc pyrithione: Reclassified as a reproductive toxicant in the EU and banned as a cosmetic preservative in 2022; still a key US OTC dandruff active.
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