Ingredient Guide

Niacinamide 5%: A Gentle Active for Everyday Skin

Niacinamide is one of the easiest actives to add to a routine — gentle, stable and friendly with almost everything else on your shelf. The detail worth checking is the concentration: a stated figure like 5% tells you it's there to do something, not just to appear on the ingredient list.

  • Evidence-based
  • Structure/function only
  • No proprietary blends

What it is

Niacinamide, also called nicotinamide, is the amide form of vitamin B3 and one of the most widely used cosmetic actives. People reach for it because it's stable, well tolerated across skin types — including skin that reacts to stronger actives — and it layers comfortably under or over the rest of a routine.

How it works

On skin, niacinamide is used to support the look of a more even tone and a hydrated, comfortable feel, and it's been studied for the appearance of tone, texture and the visible signs of aging. It's also low-maintenance: unlike actives that need careful scheduling, it can be used morning or night, on its own or alongside other steps.

Why the form & source matter

Concentration is what makes niacinamide worth using. A product that states 5% tells you how much you're getting, where an unquantified "contains niacinamide" leaves it open. Higher isn't automatically better, either — very high levels can feel less comfortable for some skin — so a clearly stated, moderate percentage in a well-made base is the sweet spot.

How Monthlees uses it

Monthlees puts 5% niacinamide in a lightweight, oil-free gel moisturizer. The gel base keeps it easy to layer, so it slots into a routine rather than replacing a step, and the oil-free finish suits oily and combination skin that tends to dislike heavier creams.

Frequently asked questions

Can I use niacinamide with vitamin C?

Yes — they're commonly used together.

Does 5% niacinamide irritate skin?

It's generally well tolerated, and 5% is comfortable for most people; sensitive skin can patch-test first.

Is it good for oily or combination skin?

Yes — lightweight, oil-free gels like this one suit oily and combination skin without a heavy finish.

What does niacinamide do for skin?

It supports the look of a more even tone and a hydrated, comfortable feel.

Research & references

  1. Topical niacinamide reduces yellowing, wrinkling, red blotchiness, and hyperpigmented spots in aging facial skin — International Journal of Cosmetic Science (2004) (source)
    Topical niacinamide associated with improved appearance of tone, texture and spots (cosmetic).
  2. Niacinamide: A B vitamin that improves aging facial skin appearance — Dermatologic Surgery (2005) (source)
    RCT: topical niacinamide improves the appearance of aging facial skin (cosmetic).

References are provided for general educational context. They do not imply that this product treats, cures, or prevents any disease.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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5% Niacinamide Vitamin B3 Gel Moisturizer

5% Niacinamide Vitamin B3 Gel Moisturizer

5% niacinamide vitamin B3 gel moisturizer — brightens, evens tone, and strengthens the moisture barrier with a lightweight, fast-absorbing finish.

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