TETRAPEPTIDE-33 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
TETRAPEPTIDE-33
Safety grade: A
Tetrapeptide-33 is a small protein fragment made up of four amino acids linked together. It's designed to protect skin from damage and help keep it smooth and hydrated.
This ingredient works to shield skin from environmental damage and improve skin texture and moisture retention, helping to keep skin looking healthier and more youthful.
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