What if your first serum could do more than just prep?

This 6-peptide booster doesn't wait for other products to work—it starts transforming your skin from the first drop.

COSRX The 6 Peptide Skin Booster Serum is the multifunctional first serum your routine has been missing. Formulated with six advanced peptides, it targets signs of aging, dullness, texture irregularities, and pore visibility in one ultra-light, fast-absorbing step.

At the core: SH-Polypeptide-121, a collagen-supporting peptide that restores skin elasticity and bounce. Copper Tripeptide-1 smooths uneven skin, while Acetyl Hexapeptide-8—nicknamed the “Botox-like peptide”—visibly softens fine lines. To address tone and sensitivity, Oligopeptide-68 brightens, and Palmitoyl Tripeptide-8 calms inflammation. Dipeptide Diaminobutyroyl Benzylamide Diacetate helps reduce sebum and minimize enlarged pores.

This serum isn’t just a prep step—it’s a performance-enhancer. Layer it under your actives or moisturizers to amplify their effects while giving your skin a smoother, firmer, more even base.

Key Benefits

• Firming & Lifting: Peptides help restore elasticity and smooth early signs of aging
• Brightens & Refines: Oligopeptide-68 helps fade discoloration and improve tone
• Pore-Smoothing Power: Targeted peptide support for sebum control and texture refinement
• Soothes & Calms: Anti-inflammatory peptides reduce redness and sensitivity
• Amplifies Skincare Absorption: Preps skin to boost the efficacy of all following products
• Weightless, Watery Texture: Absorbs fast with no stickiness—perfect for layering

Perfect For

• Aging or dull skin needing a multitasking treatment
• Oily or combination skin concerned with pores and uneven texture
• Sensitive skin users who want powerful actives without irritation
• Skincare minimalists who want a serum that does it all
• K-beauty fans upgrading to next-gen peptide technology