Questions about COSRX The Niacinamide 15 Serum 20ml

It suits most skin types and is especially nice for oily, combination, or blemish-prone skin that wants to target shine, the look of pores, and post-blemish marks.

It is a high concentration, so it is very effective, but very sensitive skin may find it tingly at first. Start with a few times a week, and patch test if your skin is reactive.

It is fragrance-free with no added fragrance or essential oils, and has a minimalist 15-ingredient formula, which makes it a good pick for those who prefer simple serums.

Niacinamide layers well with most things. It is generally best to use strong acids (AHA/BHA), vitamin C, or retinol at a different time of day so your routine is not too active at once.

Use it as your serum step after cleansing and toner, morning or night, before your moisturizer. Always follow with sunscreen in the daytime.