TETRAPEPTIDE-28 is graded A (Safe) by Expert·ING, based on COSING regulatory data.
TETRAPEPTIDE-28
Safety grade: A
Tetrapeptide-28 is a small chain of four amino acids (the building blocks of proteins) that is designed to help improve skin texture and firmness. It works by signaling skin cells to produce more collagen, which helps keep skin looking plump and youthful.
This ingredient conditions the skin by promoting collagen production and improving skin elasticity, resulting in firmer, smoother-looking skin.
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