How Niacinamide (B3) works 나이아신아마이드
Niacinamide (vitamin B3) is a precursor to NAD+ cofactors and supports ceramide and free-fatty-acid synthesis, which helps strengthen the barrier and reduce trans-epidermal water loss. It can interrupt transfer of pigment-containing melanosomes to surface skin cells, helping even tone, and helps regulate the look of oil and pores. Typically 2–5%; the old 'cannot mix with vitamin C' warning is a debunked myth at cosmetic conditions.
| Acts on | pore appearance, even tone & barrier/oil balance |
|---|---|
| Evidence | Strong |
Niacinamide (B3) guide →Effective % & pH →
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🙋 People also ask
What does niacinamide do?
Niacinamide is a form of vitamin B3 widely used in Korean skincare to help brighten the look of dullness, refine the appearance of pores and support the skin barrier. It's gentle, well tolerated by most skin types and pairs easily with many other ingredients.
How long does Korean skincare take to work?
Most skincare, Korean or otherwise, needs time. Hydration benefits can appear quickly, but visible changes in tone, texture or fine lines typically take several weeks to a few months of consistent use, roughly one skin cycle or more. Sun protection and patience matter more than any single product.
Can you use vitamin C and niacinamide together?
Yes, current understanding is that vitamin C and niacinamide can be used together safely, and many Korean formulas combine them. The old warning that they cancel out is largely outdated. If your skin is sensitive, you can still apply them at different times of day to be cautious.
Does Korean skincare work for deeper skin tones?
The skincare does — hydration, barrier support and soothing actives are not tone-specific. The friction points are mineral sunscreens that leave a cast and a colour-cosmetics shade range that has historically been narrow.
✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.