PYTHIUM OLIGANDRUM FERMENT is graded A (Safe) by Expert·ING, based on COSING regulatory data.

PYTHIUM OLIGANDRUM FERMENT

Safety grade: A

This ingredient comes from a naturally occurring fungus and is used in skincare products to help protect and condition the skin. It works by supporting the skin's natural barrier and may help reduce irritation, making it useful in moisturizers and soothing formulas.

Graded using: COSING.

Last verified: June 9, 2026