Tetrapeptide-21
Tetrapeptide-21 is a skin conditioning ingredient. It’s in 5 products on Poliage, most often serum and eye cream. Avoid lists on Poliage that include it: none.
Updated October 23, 2026
What it does
Contains Tetrapeptide-21: skin-conditioning
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 85470, accessed October 22, 2026.
Products that contain Tetrapeptide-21
Peach & Lily
Blue Copper Peptide Pro Firming Face Serum - Korean
Serum · None of Poliage’s flag groups listed
Medik8
Liquid Peptides
Serum · None of Poliage’s flag groups listed
Medik8
Liquid Peptides Advanced MP
Serum · Lists silicones
StriVectin
TL Advanced Tightening Neck Cream PLUS
Lists fragrance, fragrance allergens, exfoliating acid, silicones
Dr. Dennis Gross
Triple Correction Eye Serum
Eye cream · Lists exfoliating acid, retinoid, salicylic acid
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