SH-POLYPEPTIDE-66 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
SH-POLYPEPTIDE-66
Safety grade: A
This is a small chain of amino acids (the building blocks of proteins) created in a laboratory. It works to protect hair and skin from damage while helping to keep them moisturized and healthy-looking.
This ingredient protects hair and skin from environmental damage, provides conditioning benefits to improve softness and smoothness, and helps prevent oxidative stress that can age skin and hair.
Graded using: COSING.
Last verified: May 26, 2026
Other Antioxidant ingredients
- TOCOPHEROL — Grade A
- TOCOPHERYL ACETATE — Grade A
- BHT — Grade C**
- ASCORBYL PALMITATE — Grade A
- HYDROXYACETOPHENONE — Grade A
- PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE — Grade A
- ASCORBIC ACID — Grade A
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A