Co
Copper Gluconate
Copper Gluconate
A copper salt added in tiny amounts to condition skin.
What it does
It’s copper bound to gluconic acid, a sugar acid. The EU lists it as a skin conditioner and skin protectant.
The EU’s ingredient database lists it as a skin conditioner, its general term for an ingredient that keeps skin in good condition.European Commission, CosIng (© European Union, CC BY 4.0) · uses put in plain words by Drop ↗
The evidence, graded
expert consensusUS safety reviewers (2025) judged copper gluconate safe as used; products use it to condition skin. In three repeated patch tests, on 210, 211 and 217 people, products with up to 0.2% didn’t irritate or cause allergy. Clear cases of allergy to copper are extremely rare, given how widely copper is used, in coins, jewelry and industry. Leave-on products held at most 0.008%. They asked makers to keep heavy metals within US limits.Raj 2025 · Cosmetic Ingredient Review ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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