COSRX The 6 Peptide Skin Booster Serum 150ml x 2

A peptide booster serum that strengthens skin's foundation with 6 peptides

This is a peptide booster serum designed to be used right after cleansing, as the very first step in your routine. It brings together six different peptides in one bottle—each targeting a specific concern like elasticity, texture, pores and sebum, tone, soothing, and wrinkles—to address multiple skin needs at once. The generous 150ml size makes it easy to layer multiple times without holding back, and it's a dual-functional product with both wrinkle-improving and brightening benefits.

Clinically proven improvements in hydration, elasticity, and texture

A human application test conducted on 20 participants confirmed meaningful results.

• Hydration increased by 162.50%
• Skin texture (unevenness) reduced by 76.41%
• Skin density increased by 22.22%
• Skin brightness improved by 37.99%, luminosity by 40.11%, and radiance by 24.58%

The formula has also completed non-comedogenic testing on acne-prone skin and a low-irritation test on sensitive skin, so even those concerned about breakouts can use it with confidence.

An all-in-one formula packed with skin-friendly ingredients

It's loaded with ingredients your skin needs: hyaluronic acid for deep hydration, niacinamide for brightening and sebum control, adenosine for elasticity and wrinkle care, allantoin for soothing, and N-acetylglucosamine for gentle exfoliation. On top of that, an NMF (Natural Moisturizing Factor) complex replenishes skin moisture, making it suitable for daily use regardless of skin type or season. Use it as your first-step routine in place of toner, and it'll help boost the absorption of any serums and ampoules you apply afterward.

Start with this booster serum right after cleansing

This is a first-step booster serum designed to be used at the very beginning of your skincare routine. Skip toner and apply it directly to freshly cleansed skin. By delivering six peptides when absorption is at its peak, it helps amplify the effects of the serums and creams that follow.

Safe for daily use, morning and night

You can use it every day, regardless of your skin type or the season. In the morning, it preps and energizes your skin before the day begins. At night, it creates the perfect base for intensive overnight care. With wrinkle-improving and brightening benefits, consistent use helps support tone-evening and firming over time.

Layer generously for maximum hydration

At 150ml, there's plenty to use without holding back. Dispense a generous amount into your palms, smooth it along the skin's texture, then gently pat until absorbed. If your skin feels tight or lacks moisture, feel free to layer it two to three times for deeper hydration.

Pairing suggestions by skin concern

It works beautifully on its own, but pairing it with targeted serums can boost results even further.
- Dark spots and tone-evening: Use with a vitamin C serum
- Pores and oil control: Pair with a niacinamide serum
- Barrier strengthening and hydration: Layer with a hyaluronic acid serum

Precautions when using high-concentration actives

This serum contains niacinamide, so layering it with high-concentration niacinamide products may cause redness on sensitive skin. If using alongside a retinol cream, start with retinol 2–3 times per week in the evening only, and always follow with sunscreen the next morning. Use within 12 months of opening and store in a cool place away from direct sunlight.

Water, Dipropylene Glycol, Glycerin, Pentylene Glycol, 1,2-Hexanediol, Niacinamide, Acetyl Hexapeptide-8, Copper Tripeptide-1, SH-Polypeptide-121, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Oligopeptide-68, Palmitoyl Tripeptide-8, Allantoin, Sodium Hyaluronate, Acetyl Glucosamine, Serine, Alanine, Glycine, Threonine, Arginine, Proline, Betaine, Sodium PCA, Sodium Lactate, PCA, Glutamic Acid, Lysine HCl, Tocopherol, Dextran, Glycine Soja Oil, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Polyacrylate Crosspolymer-6, Butylene Glycol, Xanthan Gum, Ethylhexylglycerin, Adenosine, Polyquaternium-51, Disodium EDTA, Citric Acid, Caprylyl Glycol, T-Butyl Alcohol, Potassium Sorbate, Sodium Oleate

The list of ingredients is subject to change. Please consult the packaging of the product purchased.