S-RNA is graded A (Safe) by Expert·ING, based on COSING regulatory data.

S-RNA

Safety grade: A

This naturally derived ingredient comes from yeast and helps support your skin's natural moisture barrier. It works by delivering hydration deep into the skin and may help improve skin texture and firmness over time. It's often used in serums, moisturizers, and anti-aging products.

Graded using: COSING.

Last verified: June 9, 2026