COSRX The Niacinamide 15 Serum 20ml

COSRX The Niacinamide 15 Serum 20ml is a high-strength niacinamide serum formulated with 15% Niacinamide, N-Acetylglucosamine (NAG), Zinc PCA and Allantoin. It is designed to help control excess oil, refine the appearance of enlarged pores, improve uneven skin tone and reduce the appearance of post-acne marks.

Its lightweight, easy-absorbing formula is particularly suitable for oily, combination and blemish-prone skin. With continued use, it helps skin look clearer, smoother and more balanced. COSRX also identifies the formula as non-comedogenic tested.

Key Benefits

• Contains 15% Niacinamide
• Helps control excess oil and shine
• Helps refine the appearance of enlarged pores
• Helps improve uneven skin tone
• Helps reduce the appearance of post-acne marks
• Helps smooth rough-looking skin texture
• Supports clearer-looking skin
• Helps calm the appearance of redness
• Lightweight and fast-absorbing texture
• Non-comedogenic tested
• Especially suitable for oily and acne-prone skin

Key Ingredients

15% Niacinamide
Helps balance excess sebum while improving the appearance of pores, uneven tone and post-breakout marks.

N-Acetylglucosamine (NAG)
Works alongside niacinamide to support a smoother, more even-looking complexion.

Zinc PCA
Helps balance excess sebum and supports clearer-looking, less congested skin.

Allantoin
Provides soothing and skin-conditioning care.

Tocopherol (Vitamin E)
Provides antioxidant support.

Who Should Use It?

Best suited for:

• Oily skin
• Combination skin
• Acne-prone or blemish-prone skin
• Enlarged-looking pores
• Excess oil and shine
• Uneven skin tone
• Post-acne marks
• Rough or uneven texture

COSRX states that the serum can be used by all skin types, while recommending it particularly for oily and acne-prone skin.

How to Use

1. Cleanse and tone your face.
2. Apply a few drops of the serum to the entire face or problem areas.
3. Gently pat until absorbed.
4. Follow with your favorite moisturizer.
5. Use sunscreen during the daytime.

Patch testing is recommended before applying it to the entire face.

Pairing Tip

COSRX recommends pairing niacinamide with hydrating products and notes that it can work well with BHA or propolis-based skincare. For high-strength active routines, introduce products gradually to minimize the chance of irritation.