COSRX The 6 Peptide Skin Booster Serum with peptides

The COSRX 6 Peptide Skin Booster Serum packs six peptides into a watery, toner-like formula that sinks in fast and leaves no sticky film. It works as a first-step serum, the layer you press in right after toner to prep skin before the rest of your routine. The lightweight texture makes it easy to combine with the other actives you already use.

What the 6-peptide complex does for your skin

Each peptide brings something specific to the formula:

• SH-Polypeptide-121 — supports a firmer, more resilient look
• Copper Tripeptide-1 — helps smooth and refine the look of skin texture
• Dipeptide Diaminobutyroyl Benzylamide Diacetate — helps care for the look of pores and oily-looking areas
• Oligopeptide-68 — supports a brighter, more even-looking tone
• Palmitoyl Tripeptide-8 — leaves skin feeling comforted and looking calmer
• Acetyl Hexapeptide-8 — helps soften the appearance of fine lines for firmer-looking skin

Who is this serum for?

It suits anyone who wants one lightweight step that addresses several appearance goals at once — firmer-looking skin, smoother texture, the look of refined pores and a more even tone. The non-sticky, fast-absorbing feel makes it a good fit if you dislike heavy serums or want a base layer that plays well with other products.

How to use it

After cleansing and toning, dispense a few drops and press gently over the face. Use it as your first serum step, then follow with your usual treatments, moisturiser and, in the morning, sunscreen. It can be used both morning and evening.

Why use it as a first step?

Its thin, toner-like consistency layers easily without pilling, so it prepares the skin for the products that come after it. That makes it a flexible addition to most routines rather than a step you have to build everything else around.