COSRX The Niacinamide 15 Serum – 15% niacinamide serum for oily skin and uneven texture
COSRX The Niacinamide 15 Serum is a concentrated facial serum designed to care for oily skin, visible pores, uneven skin texture, and post-breakout marks. The number in the name directly refers to the formula’s key feature: a 15% concentration of niacinamide. COSRX presents this product as a serum for comprehensive care of blemish-prone skin. Its purpose is not simply to promote radiance, but to address several skin concerns that often occur together.
Niacinamide here does more than promote radiance
The concept behind this serum is based on combining niacinamide with two carefully selected partners—acetyl glucosamine and Zinc PCA. This trio targets the appearance of excess oil, pores, and uneven tone rather than overloading the formula with active ingredients. The formula’s most notable feature is its high concentration of niacinamide, complemented by ingredients that help maintain a focused profile suited to daily serum use.
- 15% niacinamide: The formula’s key ingredient helps regulate the feel of excess sebum, smooth the appearance of the skin, and support a more even-looking tone.
- Acetyl glucosamine: Combined with niacinamide in the formula, it makes the serum relevant when blemishes occur alongside uneven tone or the lingering appearance of post-breakout marks.
- Zinc PCA, trehalose, and allantoin: Zinc PCA complements the formula’s focus on oil control, while trehalose and allantoin help support skin comfort.
With its fluid, lightweight texture, the serum spreads in a thin layer and absorbs quickly without leaving a heavy or greasy film. This finish makes it easy to layer with other skincare products. COSRX The Niacinamide 15 Serum will be especially appealing to people with oily, combination, or blemish-prone skin who are looking for a single product specifically focused on sebum, the appearance of pores, and skin texture. Its strength lies not in a broad range of promises, but in its targeted combination featuring 15% niacinamide.
Usage
After cleansing and toning your face, apply a few drops of COSRX The Niacinamide 15 Serum to your fingertips and gently massage it onto your face and neck, avoiding the eye area. For best results, use the serum twice daily, in the morning and evening, and follow with your favorite moisturizer or sunscreen. Allow the serum to absorb completely before applying additional products. If you are new to niacinamide, start with a small amount and gradually increase usage to minimize any potential irritation.
Ingredients
Aqua, Pentylene Glycol, Niacinamide, Butylene Glycol, Acetyl Glucosamine, 1-2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol
The manufacturer is responsible for the product’s ingredients. Due to possible changes, we always recommend checking the ingredient list directly on the packaging.



In today's cosmetics market, where labels often resemble pages from a chemistry textbook, Cosrx Cosmetics stands out with its simple yet astonishingly effective approach. Their products contain only carefully selected active ingredients:
However, Cosrx Cosmetics cares not only for your skin but also for the planet. All their products are manufactured following the highest quality standards, without cruel animal testing. Additionally, the brand actively strives to reduce packaging waste and promotes sustainable production practices. Isn't it reassuring to know that your chosen cosmetics contribute to a cleaner planet? It's a double benefit—your skin glows, and the world becomes a little better.






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