The Niacinamide 15 SerumCOSRX The Niacinamide 15 Serum 20 ml (0.7 fl oz)

A daily step for oily and congested skin

This serum is aimed at shine, enlarged-looking pores and uneven texture. Zinc PCA joins the niacinamide to help reduce excess oil, so skin looks more refined and radiant.

Fading the look of dark spots

Alongside its work on pores, the high niacinamide level is there to help fade the appearance of dark spots and blotchy tone with regular use. It can also be applied under the eye area, avoiding the eyes themselves.

A small bottle of a strong formula

The 20 ml bottle is used a few drops at a time. The manufacturer states it is free from parabens, sulfates and phthalates and is not tested on animals.

How to use

Shake the bottle once or twice, then apply 2 to 3 drops once or twice a day. During the day, follow with an SPF 30 or higher sunscreen. It can be used under the eyes, but avoid direct contact with the eyes.

Before you choose

This is a cosmetic serum for the look of pores and tone, not a medical treatment, and results vary. For external use only. Avoid contact with the eyes, stop using it if irritation, redness or discomfort occurs, and keep out of reach of children. Store in a cool, dry place out of direct sunlight. Korean-market product: packaging may show Korean text.

Standard UK delivery: free on all orders. Estimated 2–3 working days after dispatch.

Express UK delivery: estimated 1–2 working days after dispatch. Free on orders over £50.

Please allow up to 2 working days for order processing; orders are often dispatched the next working day. Delivery times are estimates, not guarantees.

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