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Cosrx - The Niacinamide 15 Serum

Cosrx - The Niacinamide 15 Serum

CHF 16.47
CHF 17.90 CHF 16.47
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Incl. all charges, excl. shipping

High-potency K-beauty serum with 15% Niacinamide for comprehensive acne and pore care. This clinically tested Korean skincare formula pairs maximum-strength Niacinamide with Zinc PCA (1%), Acetyl Glucosamine (2%), and Allantoin to regulate sebum production, minimize enlarged pores, fade post-acne marks, and improve uneven texture. Clinically proven to reduce sebum by up to 50% and pore size by 45% in four weeks. Lightweight, non-sticky, and fragrance-free. Non-comedogenic. Suitable for oily, combination, and blemish-prone skin. Made in Korea.

Product Application

1. After cleansing and toning, apply 2–3 drops to the face during the serum step, starting from the center and working outward.
2. Gently pat and massage with fingertips until fully absorbed — do not rub.
Follow with moisturizer; apply SPF of 30 or higher in the morning as the final step.

Ingredients

Water, Pentylene Glycol, Niacinamide (15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol.

Shipping

Orders are dispatched promptly and are typically delivered within 2-3 business days.

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Frequently Asked Questions

Everything you need to know about Korean skincare and Asian beauty products

  • Korean skincare focuses on gentle, hydrating, and layering-based routines that emphasize prevention and barrier care rather than harsh treatments. Powered by innovative ingredients like centella asiatica, snail mucin, and hyaluronic acid, K-beauty products deliver deep nourishment and long-term glow for all skin types.

  • Yes — every product available on Koiyu.ch is 100% authentic and sourced directly from official Korean and Asian brand distributors. We guarantee genuine quality, safe formulations, and fresh stock so you can shop confidently.

  • Koiyu offers curated K-beauty routines for all skin types — dry, oily, combination, sensitive, or acne-prone. Explore our "Skin Type Routine" section to discover the best cleanser, toner, essence, serum, and moisturizer tailored to your needs.

  • No — all products we carry are free from parabens, sulfates, and harsh chemicals, and many are vegan or cruelty-free. Koiyu's mission is to bring you clean, effective, dermatologist-tested beauty from trusted Asian brands.

  • We ship locally from our Swiss warehouse. Orders typically arrive within 1–3 business days, and shipping is free on orders over CHF 80. Fast, reliable delivery ensures your Korean skincare favorites reach you in perfect condition.