COSRX The Niacinamide 15 Serum is a concentrated treatment serum formulated with 15% Niacinamide to help control excess oil, minimize the appearance of pores, improve uneven skin tone, and reduce post-acne marks. It is specifically designed for oily, combination, and acne-prone skin while also supporting the skin barrier and improving overall skin clarity.

International beauty retailers and skincare communities often recommend this serum for those seeking a higher-strength niacinamide product that addresses both acne concerns and pigmentation.

Key Ingredients

• 15% Niacinamide – helps regulate sebum production, brighten skin tone, and reduce the appearance of enlarged pores.
• N-Acetylglucosamine (NAG) – works alongside niacinamide to help fade post-acne marks and uneven pigmentation.
• Zinc PCA – helps control excess oil and supports blemish-prone skin.
• Allantoin – soothes and calms irritated skin.
• Panthenol (Vitamin B5) – helps strengthen the skin barrier and maintain hydration.

Benefits

✔ Helps control excess sebum and shine

✔ Reduces the appearance of enlarged pores

✔ Helps fade post-acne marks and hyperpigmentation

✔ Brightens uneven skin tone

✔ Supports a stronger skin barrier

✔ Helps reduce the appearance of blemishes

✔ Improves overall skin clarity and smoothness

✔ Lightweight and fast-absorbing formula

✔ Suitable for daily use

Texture & Finish

• Lightweight serum texture
• Absorbs quickly into the skin
• Non-greasy finish
• Layers well with other skincare products
• Leaves skin feeling smooth and hydrated

How to Use

1. Cleanse and tone your skin.
2. Apply 2–3 drops to the face.
3. Gently pat until absorbed.
4. Follow with moisturizer.
5. Use sunscreen during the daytime.

Important Tips

• If you are new to high-strength niacinamide, start with once-daily use and increase gradually.
• Can be used in both morning and evening routines.
• Pairs well with hydrating ingredients such as hyaluronic acid, Centella, and ceramides.
• Can be combined with Vitamin C, retinol, and azelaic acid in many routines, though sensitive skin users may prefer introducing products gradually.

Suitable Skin Concerns

• Acne-prone skin
• Excess oil
• Enlarged pores
• Post-inflammatory hyperpigmentation (PIH)
• Uneven skin tone
• Dullness
• Mild redness