R-LEUCOSPORIDIUM POLYPEPTIDE-1 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

R-LEUCOSPORIDIUM POLYPEPTIDE-1

Safety grade: A

This is a protein-based ingredient derived from a type of yeast that helps fight dandruff-causing microorganisms and bacteria on the scalp and skin. It works to reduce flaking while also conditioning and protecting hair and skin.

This ingredient is used to combat dandruff and bacterial growth while providing conditioning and protective benefits to hair and scalp.

Graded using: COSING.

Last verified: May 26, 2026