TETRAPEPTIDE-19 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
TETRAPEPTIDE-19
Safety grade: A
Tetrapeptide-19 is a very small protein fragment made up of four amino acids linked together. It's designed to help improve skin texture and firmness by supporting the skin's natural structural proteins.
This ingredient conditions and firms the skin by stimulating collagen production and improving skin elasticity, resulting in a smoother and more youthful-looking complexion.
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