Niacinamide is one of the most versatile and well-tolerated active ingredients, strengthening the skin barrier, regulating sebum, evening skin tone, and reducing inflammation. Backed by extensive clinical research and assessed as safe by CIR with an excellent safety profile, it works well across all skin types and is safe to use daily.
Niacinamide (INCI: Niacinamide, CAS 98-92-0), also known as nicotinamide or vitamin B3, is a water-soluble form of vitamin B3 widely used in skincare formulations. It is a precursor to nicotinamide adenine dinucleotide (NAD+), a critical coenzyme involved in cellular energy production and numerous metabolic pathways in the skin. Unlike other B vitamins, niacinamide is exceptionally stable, does not require refrigeration, and shows no photodegradation.
The CIR Expert Panel has concluded that niacinamide is safe in the current practices of use and concentration in cosmetics. While niacinamide is not listed in EU Annex II or III (meaning no specific EU concentration limit exists), CIR's safety conclusion applies to concentrations typically found in cosmetic products — it is not an endorsement of unlimited concentrations. This ingredient has been extensively studied in clinical trials and has demonstrated consistent efficacy across a broad range of skin concerns, from acne-prone skin to ageing and sensitivity.
Niacinamide's primary mechanism involves enhanced ceramide and lipid synthesis, which strengthens the skin barrier and reduces transepidermal water loss (TEWL). It also has been observed to regulate sebum production through inhibition of lipogenesis in sebaceous glands, modulate melanin transfer (helping with even tone), and possess anti-inflammatory and antioxidant properties. These multifaceted benefits make it one of the most versatile ingredients in modern skincare.
Niacinamide has been observed to enhance ceramide and fatty acid synthesis, reinforcing the skin's lipid barrier. This reduces water loss and strengthens resilience against environmental stressors, making it particularly beneficial for dry, sensitive, and compromised skin.
Clinical studies show that niacinamide regulates sebum production by modulating lipogenesis in sebaceous glands. Regular use has been observed to reduce shine, minimize the appearance of enlarged pores, and improve skin texture in oily and combination skin types.
Niacinamide inhibits melanin transfer from melanocytes to keratinocytes, helping fade dark spots, post-inflammatory hyperpigmentation, and uneven tone. Results are gradual but consistent with continued use over 8–12 weeks.
Niacinamide reduces inflammation and has been observed to calm redness, soothe irritated skin, and improve skin comfort. It is ideal for rosacea, eczema-prone, and acne-prone skin types where barrier support and inflammation reduction are priorities.
Generally suitable for: All skin types — normal, dry, oily, combination, sensitive, rosacea-prone, and acne-prone. It is one of the few active ingredients that strengthens barrier function rather than compromising it, making it ideal for sensitive and compromised skin states.
The CIR Expert Panel concluded that niacinamide is safe in the present practices of use and concentration. There are no specific EU restrictions (not listed in Annex II or III). Niacinamide is non-sensitizing at cosmetic concentrations, does not cause photosensitivity, and poses no reproductive toxicity concerns based on available animal data. It is one of the most universally well-tolerated active ingredients in skincare.
Gentle Introduction: At typical concentrations (2–5%), most people can apply niacinamide twice daily from the first use without irritation. However, higher-concentration products (above 5%) may cause transient flushing or mild irritation in some individuals, particularly those with compromised skin barriers. If you experience warmth or redness, reduce frequency or switch to a lower concentration.
No Photosensitivity: Niacinamide does not increase sun sensitivity. Daily sunscreen is always recommended, but not specifically because of niacinamide use.
Stability & Storage: Niacinamide is extremely stable in cosmetic formulations. It does not degrade in light or air and requires no special storage conditions.
Daily Use Safe: Niacinamide can be used morning and night without cumulative toxicity concerns. At commonly used cosmetic concentrations (2–5%), no adverse effects have been reported with daily application.
Niacinamide is generally considered a low-risk ingredient during pregnancy and nursing. Unlike vitamin A derivatives (retinol, tretinoin) which are established teratogens, niacinamide has no known teratogenicity or reproductive toxicity concerns based on available data. It is frequently included in dermatologist-recommended skincare routines for pregnant individuals. However, dedicated clinical trials on niacinamide use during pregnancy are limited. Always consult your healthcare provider for personalized advice.
Begin with a gentle cleanser to remove makeup, oil, and impurities. Pat skin dry with a clean towel. Unlike some active ingredients, niacinamide works equally well on damp or dry skin.
Apply niacinamide product (serum, toner, or treatment) directly to clean skin. Use after toner and before heavier products like moisturiser and oils. A pea-sized amount of serum or a light layer of essence is typically sufficient.
Layer your regular moisturiser on top to seal in hydration and further support barrier repair. Niacinamide pairs exceptionally well with ceramide-rich and hyaluronic acid moisturisers.
Niacinamide has no photosensitivity concerns and works equally well in morning and night routines. Use it twice daily for maximum benefit, or once daily if preferred. Consistency matters more than timing.
Lightweight, fast-absorbing, and typically contains higher niacinamide concentration (5–10%). Best for targeted treatment and easy layering with other products.
Niacinamide in a moisturiser base provides hydration and barrier support simultaneously. Often 3–5% concentration, ideal for dry and sensitive skin types.
Water-based niacinamide formulations are gentle and easily absorbed. Common concentration 2–5%, suitable for all skin types and layerable with other actives.
A hydrating powerhouse that works synergistically with niacinamide's barrier repair. Layer hyaluronic acid on damp skin, follow with niacinamide, then moisturiser for maximum hydration.
Niacinamide strengthens the barrier and reduces inflammation, making it an ideal companion to retinol. They are frequently combined in formulations or used in the same routine to offset retinol-induced irritation.
Zinc compounds combined with niacinamide enhance sebum regulation and have synergistic antimicrobial effects, making them ideal for acne-prone skin.
Peptides support collagen and elasticity without added irritation. Niacinamide pairs well with peptides in the same routine, amplifying anti-ageing benefits.
At very low pH, niacinamide can convert to niacin, which may cause flushing and redness. Avoid combining with strong acids at pH below 2. Severity: 2/5. Safe if formulation is pH-buffered above 3.
Older studies suggested pH incompatibility between L-Ascorbic Acid and niacinamide, but modern stable formulations have largely resolved this concern. The two can be used together safely — the main consideration is potential irritation when combining high concentrations of both, particularly on sensitive skin. If irritation occurs, use at different times of day. Severity: 1/5.
Found in thousands of products across our database. Niacinamide is one of the most widely used active ingredients in modern skincare. Here are some well-known options (ingredient lists verified via INCI):
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