Key Ingredients

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FAQ's

The COSRX 6 Peptide Skin Booster Serum is a multi-tasking formula designed to address six major skin concerns in one step. It utilizes a blend of six different peptides to improve skin elasticity, reduce the appearance of fine lines, soothe redness, control sebum, and refine skin texture. It acts as a "booster," meaning it enhances the effectiveness of any skincare products you apply afterward by prepping the skin and improving its overall health.

This product should be used as the very first step of your skincare routine immediately after cleansing. Because of its lightweight, watery consistency, it functions as both a toner and a serum. Simply apply a generous amount to your face and neck, then follow up with your specific targeted serums (like Vitamin C, Retinol, or Hyaluronic Acid) and a moisturizer to lock in the peptides.

Yes, this serum is highly compatible with other active ingredients. In fact, peptides are known to work synergistically with Retinol and Vitamin C. Using the Peptide Booster first can help soothe the skin and reinforce the skin barrier, potentially reducing the irritation often associated with stronger actives while boosting their anti-aging and brightening effects.

Absolutely. The serum has a non-greasy, water-based texture that absorbs instantly into the skin. One of the six peptides in the complex is specifically included to help manage sebum production and refine pore texture, making it an excellent choice for oily or acne-prone skin types who want anti-aging benefits without a heavy or pore-clogging residue.

Yes, firming is one of its primary functions. By utilizing a "6-Peptide Complex," the serum signals the skin to support natural collagen production and repair. Regular use helps to improve skin "rebound" and elasticity, making the skin feel firmer and look more plump, which helps minimize the appearance of sagging and expression lines.

While a regular serum usually targets one specific issue (like dark spots or hydration), this "Booster" is designed to be a comprehensive base layer that improves the overall "skin environment." Its high-volume 150ml packaging allows for more generous application compared to standard 30ml serums, intending to prep the entire face and neck for better absorption of the rest of your routine.

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