Nickel and cobalt release from be…man cosmetics trade.

Findings

Nearly half of beauty tools tested (46.4%) released nickel at levels that can trigger allergic reactions — even tools that don't look metallic. Cobalt release was less common but still present in 5.8% of tools. If you use beauty tools regularly, especially metal ones or those with metal parts, you could be exposed to these allergens every time you use them.

Design
Review
Evidence
Moderate
Journal
Contact dermatitis
Ingredients studied