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  • Redness Relieving Serum: Refine Pores, Smoothen Skin, Relieve Redness. The Niacinamide and Zinc PCA instantly improves skin texture and radiance by reducing excess oil and minimizing pore sizes.
  • Key Benefits: Based on real results from consumers' self assessments, the Niacinamide 15 Serum minimizes pore size, improves skin texture, and helps fade dark spots.
  • Dermatological Ingredients: 15% Niacinamide helps minimize enlarged pores and refine uneven skintone. Zinc PCA prevents potential breakouts from occurring.
  • How to Use: Shake 1-2 times before use and apply 2-3 drops once or twice daily. For daytime wear, follow up with SPF 30+ sunscreen. Can be applied under the eye area; avoid direct eye contact.
  • COSRX Standards: All COSRX products are formulated with skin-friendly ingredients that alleviate irritated skin. Hypoallergenic, Dermatologist tested, Animal Testing-FREE, Parabens-FREE, Sulfates-FREE, Phthalates-FREE. [!] NOTICE: Please be informed that the expiration date on the product is written in the South Korean format, which goes by Year/ Month/ Date. For instance, if the expiration date on the package is 2024.11.15, this refers to November 15, 2024.

COSRX believes that cosmetics should give more than just outward beauty. We are devoted to enabling individuals to find solutions according to their personal skin conditions. We strive to help our customers gain self-confidence, and ultimately find their own unique beauty inside.

Featured in

COSRX has been featured in multiple prominent magazines and our products have received praise from many trusted editors. As proven by the countless articles that have been released, COSRX will continue to listen to the voices of our customers and strive to improve.

Can this be used on sensitive skin?

Based on a Primary Dermal Irritation Study (on 30 subjects for 24 hours) the “COSRX The Niacinamide 15 Serum” is found to be a non-irritant product that causes no irritation for sensitive skin.

How do I know if this product is authentic?​

To ensure the authenticity of the product, please make sure you are purchasing the product from COSRX Inc. ​The authenticity of the product cannot be promised when purchased from sellers other than COSRX Inc.

Orders & Shipping

About Glam Global UK

Glam Global UK is a genuine business registered in England under Glamglobal Ltd  (Company No: 15456055). Our office headquarters is located at GlamGlobal Ltd
27 Old Gloucester Street
London, WC1N 3AX

Order Processing

We process all orders within 1-2 business days at our UK-based warehouse. Unfortunately, we cannot make changes to an order after it is placed. Please ensure all details are correct when checking out.

During high volume periods, processing can take up to 5 business days. You will receive confirmation when your order ships with tracking details to monitor its progress directly via Royal Mail.

Shipping Policies

UK Orders

  • Free standard shipping on orders over £50
  • Delivered by Royal Mail within 5-7 business days

Shipping Details:

  • Origin of Shipments: Some of our products are shipped from our warehouses in the United States or Korea. This allows us to offer you a diverse range of quality products. We want to assure you that all items are carefully selected and undergo strict quality control before dispatch.

  • Estimated Delivery Time: Please allow 7-10 days for delivery, considering the additional time required for shipments from the United States or Korea. This ensures that your orders reach you securely and in excellent condition. Please note any tax from International Delivery is included in your price paid at checkout.

International Delivery to UK Tax:

  • Included in Price: Please note that any tax from international delivery is already included in the price you paid at checkout. This is to provide you with a seamless and transparent shopping experience, and there will be no additional charges upon delivery.

Order Changes: Once an order is placed, we regret to inform you that we cannot make changes to it. Therefore, please double-check all details during the checkout process to ensure accuracy.

International Orders from countries other then the United Kingdom 

  • Shipping fee calculated at checkout based on destination
  • Import duties and taxes may apply upon delivery

Returns Policy

  • 30 day return window
  • Original shipping fees are non-refundable
  • Contact customer service to initiate a return