COSRX Niacinamide 15% + Peptide Booster Set — Pore Control & Hydrating Duo for Oily/Texture-Prone Skin

COSRX Niacinamide 15% & Peptide Booster Serum Set is a two-step skincare pairing designed to refine pores, calm redness, and boost overall skin texture while layering hydration.

This set combines a high-concentration niacinamide serum with a peptide-rich booster toner to target excess oil, enlarged pores and uneven tone without heavy silicones or sticky residue. The duo is formulated for routine use: the peptide toner preps and strengthens skin, while the niacinamide serum focuses on oil control and radiance. Ingredients like zinc PCA and six different peptides support clarity and elasticity, making it a straightforward addition to morning or evening regimens.

How does the peptide booster prepare skin for treatment?

The peptide booster acts like a conditioning step that improves skin bounce and resilience before active serums. Applying this toner first helps the skin accept and retain subsequent treatments, reducing friction and encouraging even absorption.

• Contains six peptides to support firmness and surface texture.
• Light, watery texture that layers easily under serums and moisturizers.
• Patting application improves product penetration without rubbing.

What benefits does the niacinamide 15% serum deliver?

The concentrated niacinamide formulation targets oil balance and the look of pores while improving overall skin luminosity. Zinc PCA is paired in the formula to manage excess sebum and help skin appear smoother with regular use.

• High 15% niacinamide concentration for visible texture improvement.
• Zinc PCA supports oil control and lessens shine on oily-prone areas.
• Lightweight drops that spread evenly and layer well under moisturizers.

How should I use the two products together in my routine?

Use the peptide booster right after cleansing to hydrate and prime the skin. Follow with 2–3 drops of the niacinamide serum, gently pressing it into the face; finish with a moisturizer or SPF as needed for your routine.

• Step 1: After cleansing, dispense 2–3 pumps of the peptide booster and pat to absorb.
• Step 2: Apply 2–3 drops of the niacinamide serum and spread gently.
• Step 3: Seal with moisturizer and daytime SPF or a night cream in evening use.

Is it safe to layer these actives and who should patch-test?

The two-step system is designed for layering, but because of the high niacinamide concentration and active peptides, a patch test is advised before full-face use. If you have extremely sensitive or reactive skin, introduce the serum gradually and monitor for irritation.

• Patch test on an inner forearm and wait 24 hours before facial application.
• Stop use and consult a physician if persistent irritation occurs.
• Introduce into routine slowly—every other night, then increase frequency as tolerated.

Who is this for: The COSRX Niacinamide 15% & Peptide Booster Serum Set is well suited to people with oily or combination skin who want to minimize visible pores and reduce redness without heavy creams. It's also useful for anyone seeking a layered approach—hydrating primer plus high-strength niacinamide—for smoother texture and balanced shine. If your skin is extremely sensitive, perform a patch test and introduce the products gradually.

Ingredients

15% Niacinamide with Zinc PCA, 6 Peptides with Hyaluronic Acid And Allantoin