Niacinamide: Comedogenic Rating & Safety Profile

Niacinamide is a antioxidant with a safe comedogenic profile (0/5) and low risk irritancy (1/5). A multi-tasking form of Vitamin B3 that reduces sebum, fades pigmentation, strengthens the moisture barrier and calms redness.

What is Niacinamide?

Niacinamide is the amide form of vitamin B3 (also called nicotinamide). It is a small, water-soluble molecule that the skin absorbs easily and converts into the coenzymes NAD+ and NADP+, both of which power dozens of cellular repair processes. Cosmetic-grade niacinamide is synthetically produced to pharmaceutical purity, so the form you find in skincare is identical regardless of brand. It belongs to the broad antioxidant and barrier-support category, but it is unusually multi-functional: it regulates sebum, fades pigmentation, calms inflammation and strengthens the moisture barrier — all from a single molecule.

Comedogenic Rating: What 0/5 Means for Your Skin

Niacinamide is rated 0/5 comedogenic. It is water-soluble, has no oily backbone and cannot physically obstruct a pore. In fact, multiple peer-reviewed studies show that 2–5% niacinamide actively reduces sebum production and visibly shrinks the appearance of enlarged pores over 8–12 weeks. It is one of the very few actives that is genuinely safe for every skin type — including the most reactive, acne-prone or rosacea-affected skin.

• Reduces visible pore size by regulating sebum
• Fades post-inflammatory hyperpigmentation (PIH) over 8–12 weeks
• Strengthens ceramide synthesis, reducing transepidermal water loss
• Compatible with retinoids, AHAs/BHAs and Vitamin C (modern formulations)

Niacinamide is exceptionally well-tolerated. The main reported side effect is transient flushing — a warm, pink response that some users experience above 10%. This is not the same as irritation; it usually settles within 8–10 minutes. A small minority of sensitive users find it tingles for the first week of use. Genuine allergy is extremely rare. The old myth that niacinamide cancels out vitamin C has been comprehensively debunked — they layer perfectly in modern formulations.

2–5% once or twice daily is the sweet spot for almost everyone. Apply after cleansing and any acid serums, and before heavier creams or oils. Niacinamide layers safely with retinoids, AHAs/BHAs, vitamin C, hyaluronic acid and peptides. If you are new to actives, niacinamide is the safest starting point.

Look for niacinamide in serums, moisturisers, toners, essences, eye creams and sunscreens. It is one of the most common 'hero' ingredients in modern skincare and appears in everything from drugstore lines to luxury brands.

Found Niacinamide in your skincare?

Paste the full ingredient list into our INCI Analyser to see how this ingredient interacts with everything else in the formula.

Want the full picture on pore-clogging ingredients? Read our complete guide to comedogenic ingredients for the dermatology research behind the 0–5 scale and the full list of high-risk ingredients to avoid.

Sources

• DermNet NZ
• PubChem (US National Library of Medicine)
• Cosmetic Ingredient Review (CIR)

Written by ScanSkinAI Team · Last updated May 2026

This information is for educational purposes only. Always patch-test new products and consult a dermatologist if you have specific skin concerns.