ProtoClinical k-beauty COSRX The Niacinamide 15 Serum 20ml single centered serum bottle on a white background with dark gray packaging
COSRX

COSRX The Niacinamide 15 Serum 20ml

$15.72
Delivers concentrated actives deep into the skin Targets specific concerns with a lightweight, fast-absorbing formula Helps improve skin texture and tone with consistent use

Total acne care with 15% niacinamide


Highly concentrated serum that combines the maximum concentration of niacinamide with optimal ratios of synergistic ingredients for total acne control. 

For all skin types dealing with acne and breakouts: COSRX's serum with Niacinamide works from within to deliver delivers concentrated actives deep into the skin, not just temporary comfort.
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Niacinamide 15%: intercepts melanin transfer to fade spots and refine pore texture from within
COSRX The Niacinamide 15 Serum 20ml
COSRX The Niacinamide 15 Serum 20ml Default Title
$15.72
Ingredient-focused product details Clear use directions Full INCI when available Delivery confirmed at checkout
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Niacinamide 15%

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. In this serum, Niacinamide targets acne and breakouts, delivering delivers concentrated actives deep into the skin with consistent use.

Niacinamide 15%
intercepts melanin transfer to fade spots and refine pore texture from within
Texture

Lightweight, absorbing

All Skin Types
Hover the swatch: it ripples like water

How to use

Wear alone or under makeup.
Full transparency

Ingredients

Tone-up pigments in a light cream-lotion base that brightens and smooths the look of skin.

Niacinamide works at the junction between melanocytes and keratinocytes, intercepting melanin transfer before pigment reaches the visible surface. It simultaneously boosts ceramide synthesis to strengthen the lipid barrier, which is why consistent use addresses both discoloration and dehydration. In this serum, Niacinamide targets acne and breakouts, delivering delivers concentrated actives deep into the skin with consistent use.

The detail

Specs & details

FormatLightweight serum
SizeDefault Title
Skin typesAll Skin Types
Country of originSouth Korea
Before you add to cart

Questions & answers

After cleansing and toning, before moisturizer. Serums deliver actives most effectively on freshly prepped skin.
Yes. Apply from thinnest to thickest consistency and allow each layer to absorb before the next.
Most users notice initial improvement within 2 to 4 weeks. For full benefits like delivers concentrated actives deep into the skin, allow 6 to 8 weeks of consistent use.
Your skin begins adjusting. You may notice improved hydration and comfort before more visible changes like texture refinement become apparent.
Yes, this formula is developed to be compatible with all skin types dealing with acne and breakouts. If you have very reactive skin, patch test on the inner arm before full application.
The formula is designed to be well-tolerated. For pregnancy-specific concerns, consult your healthcare provider. For sensitive skin, patch test before full application.
Niacinamide intercepts melanin transfer to fade spots and refine pore texture from within. Consistent daily use is key to seeing the full benefits.
Check the INCI list for the most accurate information on fragrance components. The formula is developed for minimal irritation potential.
Store in a cool, dry place away from direct sunlight. Use within 12 months of opening for optimal freshness and efficacy.
Serums have a higher concentration of targeted actives than essences and a lighter consistency than most ampoules. They deliver the most potent treatment in your routine.
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