OSTREA SHELL EXTRACT is graded A (Safe) by Expert·ING, based on COSING regulatory data.

OSTREA SHELL EXTRACT

Oyster Shell Extract

Safety grade: A

Oyster shell extract is a powder or liquid derived from crushed oyster shells, which are primarily composed of calcium and minerals. It's used in skincare products to provide minerals and promote skin health.

This ingredient is used in cosmetics for its mineral content, which may help to nourish, mineralize, and support the skin's natural barrier function.

Graded using: COSING.

Last verified: May 26, 2026