FAQ
What makes COSRX The Niacinamide 15 Serum effective for oily and acne-prone skin?
COSRX The Niacinamide 15 Serum contains a 15% concentration of niacinamide combined with Zinc PCA. This formula helps regulate sebum production, minimize the appearance of enlarged pores, and help breakouts care while calming redness. The lightweight, non-sticky texture makes it ideal for oily and congested skin that needs active yet gentle care.
How does niacinamide help control sebum and minimize large pores?
Niacinamide helps support by balancing excess oil production and strengthening the skin barrier, which helps reduce the buildup of sebum inside pores. Over time, this helps pores appear smaller and skin texture become smoother. The addition of Zinc PCA in COSRX’s formula enhances this oil-control effect for visibly clearer skin.
When can I expect to see results from using The Niacinamide 15 Serum?
Clinical tests by the Dermacosmetic Skin Science Laboratory showed visible improvements in 4 weeks, including a 45% decrease in pore size, 48% reduction in oiliness, and improvement in skin tone and blackheads.
Can COSRX The Niacinamide 15 Serum be used with other active ingredients?
It’s best not to use AHA & BHA, Vitamin C, or Retinol at the same time, as they can be too strong when combined. Instead, use them at different times of the day. Hydrating ingredients like Hyaluronic Acid or Peptide Serum, however, are gentle and can be used together for added moisture.
Does the Niacinamide 15 Serum Help with Blemish Scars?
Yes. The high-strength niacinamide and Acetyl Glucosamine combination targets dark spots and uneven tone caused by acne. Clinical data shows a 19% improvement in pigmentation and 15% reduction in blemishes after four weeks, helping restore skin clarity and radiance.
Is COSRX The Niacinamide 15 Serum suitable for sensitive skin?
The formula is clinically proven and proven non-comedogenic, meaning it will not clog pores or trigger breakouts. It’s free from common irritants and formulated to calm redness, making it suitable for both acne-prone and sensitive skin types.
How should I include The Niacinamide 15 Serum in my daily skincare routine?
After cleansing and toning, apply 2–3 drops of the serum evenly across the face. Follow with a moisturizer to lock in hydration. The serum absorbs quickly and layers well under sunscreen or makeup, making it suitable for both morning and nighttime use.