Niacinamide

The Ingredient Library · Ingredient

Niacinamide

The multitasking vitamin B3 for refined pores and even-looking tone.

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INCI nameNiacinamide
TypeVitamin B3 — refining & tone-evening
Key benefitRefined-looking pores and more even-looking tone
SuitsAll skin types, including sensitive and blemish-prone skin
Niacinamide

What is this

Niacinamide

Niacinamide is a water-soluble form of vitamin B3 and one of skincare's most studied ingredients. Gentle and compatible with nearly every routine, it helps support the skin's moisture barrier, refine the look of pores and promote a more even, balanced-looking complexion.

Niacinamide, a water-soluble form of vitamin B3, is among the most studied and best-tolerated actives in skincare. It helps reinforce the skin's moisture barrier, supports hydration and works to visibly refine pores and even the look of skin tone, softening the appearance of fine lines over time. Gentle enough for sensitive and blemish-prone skin yet meaningfully effective, it pairs gracefully with nearly every other ingredient — which is why The Nine Aurora includes it in both its day and night serums, where steady, cumulative refinement matters most.

In which products

Formulas with niacinamide

Every ingredient in our library serves one measure of success — skin longevity — the years skin keeps its strength, moisture and evenness.

Questions about niacinamide

What is niacinamide?

Niacinamide is a water-soluble form of vitamin B3 and one of the most researched ingredients in modern skincare. Gentle, stable and compatible with almost every other ingredient, it is used to support the skin's moisture barrier and promote a smoother, more even-looking complexion.

What does niacinamide do for skin?

It helps boost skin hydration, refine the look of pores, visibly even skin tone and soften the appearance of fine lines. Because it supports the skin's own barrier, it also helps skin feel calmer and more balanced with consistent use.

Does niacinamide shrink pores?

Not physically — no cosmetic can change a pore's structure. What niacinamide does is address what makes pores conspicuous: it helps balance the look of surface oil and refine texture, so pores appear smaller and skin looks smoother over weeks of use.

Can I use niacinamide with vitamin C?

Yes. The idea that they cancel each other out is a persistent myth based on outdated research. In modern formulas they pair well, and together they can complement each other's brightening and antioxidant benefits within the same routine.

How long does niacinamide take to work?

Most people notice better-hydrated, smoother-feeling skin within about four weeks, with tone and pore appearance improving more visibly around eight weeks. Like all cosmetic actives, it rewards consistency rather than intensity.