R-(DIPEPTIDE-43 MUSSEL POLYPEPTIDE-2 DIPEPTIDE-44 MUSSEL OLIGOPEPTIDE-1 TETRAPEPTIDE-70 MUSSEL POLYPEPTIDE-2 DIPEPTIDE-40 SH-PENTAPEPTIDE-40) is graded A (Safe) by Expert·ING, based on COSING regulatory data.

R-(DIPEPTIDE-43 MUSSEL POLYPEPTIDE-2 DIPEPTIDE-44 MUSSEL OLIGOPEPTIDE-1 TETRAPEPTIDE-70 MUSSEL POLYPEPTIDE-2 DIPEPTIDE-40 SH-PENTAPEPTIDE-40)

Safety grade: A

This ingredient is derived from mussels and contains natural protein fragments that work to hydrate and condition skin. It helps strengthen the skin's outer barrier while promoting a smoother, more resilient complexion. Commonly used in skincare products for its moisturizing and protective benefits.

Graded using: COSING.

Last verified: June 9, 2026