COSRX The 6 Peptide Skin Booster

Six peptides, one job each — nothing wasted.

COSRX built The 6 Peptide Skin Booster around six targeted peptides instead of one do-it-all blend: SH-Polypeptide-121 for collagen support and plumping, Copper Tripeptide-1 for retexturizing, Acetyl Hexapeptide-8 for smoothing fine lines, Palmitoyl Tripeptide-8 for calming sensitivity, Oligopeptide-68 for brightening, and Dipeptide Diaminobutyroyl Benzylamide Diacetate for pore and sebum care.

Hyaluronic Acid and NAG (N-Acetyl Glucosamine) handle hydration and tone-evening, while a full amino acid complex — Serine, Alanine, Glycine, Proline and more — mimics skin's own Natural Moisturizing Factor to keep water locked in. Niacinamide and Adenosine round out the brightening and anti-aging side.

Lightweight, fast-absorbing, no sticky finish — apply after toner and before moisturizer. A solid pick if you want one step that covers texture, tone, and firmness instead of layering multiple targeted serums.

FAQ

What do the 6 peptides in this serum do?
Each targets something different — SH-Polypeptide-121 and Acetyl Hexapeptide-8 support firmness and fine lines, Copper Tripeptide-1 retextures, Palmitoyl Tripeptide-8 soothes sensitivity, Oligopeptide-68 brightens, and Dipeptide Diaminobutyroyl Benzylamide Diacetate helps with pores and sebum.

What is NAG and what does it do?
NAG (N-Acetyl Glucosamine) is used alongside Hyaluronic Acid to support hydration and a more even-looking skin tone.

Where does this serum go in my routine?
Apply after toner and before moisturizer, as a hydrating, texture-improving step.