The Niacinamide 15 Serum

COSRX's Niacinamide 15 Serum (20ml) is a concentrated serum designed to visibly improve skin quality.reduce imperfections and refine skin texture.

With 15% niacinamide, itIt effectively addresses excess sebum, visible pores, acne scars, and uneven skin tone.while respecting the skin's natural balance. Its formula helps the skin regain a healthy appearance.sharper and more uniformwhile strengthening the skin barrier. Thanks to itslight textureand quickly absorbed, the serum penetrates without leaving a sticky finish, making it easy to integrate into a daily routine.

Ideal foracne-prone, shiny, or uneven skinThis serum helps to reveal smoother, more balanced and visibly healthier skin.

1. After cleansing and toning, apply a few drops to your face.
2. Gently massage until fully absorbed.
3. Focus on areas prone to blemishes or visible pores.
4. Preferably use in the evening, or introduce gradually if your skin is sensitive.
5. In the morning, always apply sunscreen.

💡To avoid any reaction, gradually introduce each new skincare product into your routine. Your skin needs time to adjust! Also remember to test the product on a small area of your hand before applying it to your face.

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

Can I use COSRX The Niacinamide 15 Serum every day?

Yes, but it is best to take it slow at first. With a 15% niacinamide concentration, your skin needs time to adjust: start by applying it every other day, preferably in the evening, then increase the frequency based on your tolerance. If your skin handles it well, you can move on to daily use. In the morning, never forget your sunscreen; niacinamide does not protect against UV rays.

Can I combine COSRX The Niacinamide 15 Serum with vitamin C, acids, or retinol?

Yes, but with a few precautions. Niacinamide pairs well with most active ingredients, but to avoid tightness, avoid layering this serum with exfoliating acids (AHA or BHA) or retinolat the same time. Ideally, alternate your products, morning and evening, or use each one every other day. With vitamin C, simply let each layer dry before applying the next one.

How long does it take to see the effects of COSRX The Niacinamide 15 Serum?

Sources do not provide a precise timeframe, and that is normal: every skin reacts differently. What we do know is that niacinamide works graduallyon the appearance of pores, shine, and marks with regular use over several weeks. Patience and consistency are key: apply the serum every evening (or every other day if your skin is sensitive) and let time do its work.

What are the drawbacks of 15% niacinamide?

At this concentration, the main risk is irritation if the skin is not accustomed to concentrated active ingredients. That is why we recommend a gradual introduction, especially for sensitive skin. The formula also contains allantoin and zinc PCA, designed to soothe and minimize tightness. Always perform a patch test on a small area of skin before the first full-face application.

Where can I buy COSRX The Niacinamide 15 Serum in France?

Holy Skin ships this serum from France, with no customs fees and guaranteed authenticity on every COSRX product. No need to deal with foreign websites or unpredictable customs: everything is designed to simplify your purchase. You can find the entire range in the COSRX collection.