TETRAPEPTIDE-4 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
TETRAPEPTIDE-4
Safety grade: A
This is a tiny protein fragment made up of four amino acids linked together. It's a laboratory-created ingredient designed to improve how skin feels and looks.
Tetrapeptide-4 is used in skincare products to condition and improve skin texture, helping to make skin feel smoother and more supple.
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