POLYPEPTIDE-1 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
POLYPEPTIDE-1
Safety grade: A
Polypeptide-1 is a small chain of amino acids (the building blocks of proteins) created in a laboratory. It works to help skin feel smoother and more hydrated by supporting the skin's natural moisture barrier.
This ingredient conditions and softens the skin by improving hydration and helping to maintain the skin's natural protective barrier.
Graded using: COSING.
Last verified: May 26, 2026
Other Skin Conditioning ingredients
- TOCOPHEROL — Grade A
- PROPYLENE GLYCOL — Grade A**
- XANTHAN GUM — Grade A
- DIMETHICONE — Grade A
- TOCOPHERYL ACETATE — Grade A
- PANTHENOL — Grade A
- CAPRYLYL GLYCOL — Grade A
- ETHYLHEXYLGLYCERIN — Grade A