Niacinamide (Vitamin B3) Serum, graded Moderate-evidence on Magellan — applied topically it is a small, water-soluble molecule used in cosmetic serums and moisturizers, typically at concentrations of about 2-5%. Studied dose: Topical 2-5%; most positive trials used 4-5% over 8-12 weeks.
Source: Dermatol Surg 2005, PMID 16029679 ↗ · Skin & Topical Longevity · How Magellan grades evidence · Study write-up · evidence confidence: high
Niacinamide (nicotinamide) is the amide form of vitamin B3 and a precursor of the cellular cofactors NAD+ and NADP+, which are central to energy metabolism and cellular repair. Applied topically it is a small, water-soluble molecule used in cosmetic serums and moisturizers, typically at concentrations of about 2-5%. In skin it has been reported to stimulate the synthesis of ceramides and other stratum corneum lipids, to inhibit melanosome transfer from melanocytes to keratinocytes, and to modulate sebum production.
Randomized, mostly split-face trials indicate that topical niacinamide can modestly improve the appearance of fine lines and wrinkles, hyperpigmented spots, red blotchiness, sallowness and skin elasticity, while strengthening the skin barrier and reducing transepidermal water loss. Most positive studies used 4-5% niacinamide over 8-12 weeks, and many were sponsored by cosmetic manufacturers or tested niacinamide within multi-ingredient formulations, so effects attributable to niacinamide alone can be hard to isolate and the benefits are gradual rather than dramatic. Separately, a large oral (not topical) phase 3 trial found nicotinamide reduced new non-melanoma skin cancers by 23% in high-risk patients, and a 2025 propensity-matched cohort of over 33,000 veterans found oral nicotinamide use associated with about 16% lower skin-cancer risk - but that study was observational, the trial benefit waned after stopping, and neither result applies to a topical serum. This evidence describes the compound niacinamide and its mechanisms, not this specific commercial serum, which has not itself been tested in the cited studies.
Peer-reviewed studies on the active compound — citations link to PubMed.
“reductions in fine lines and wrinkles, hyperpigmented spots and skin sallowness”
“significant reductions in pore and evenness counts and wrinkle counts were noted”
“the formulation with niacinamide improved stratum corneum water content and reduced water loss”
“Niacinamide was well tolerated by the skin and provided significant improvements versus control in end points evaluated previously: fine lines/wrinkles, hyperpigmentation spots, texture, and red blotchiness. In addition, skin yellowing (sallowness) versus control was significantly improved.”
“This cosmetic showed marked and moderate improvement in 64% of the subjects with a significant difference as compared with the control site (P < 0.001). Wrinkle grades in the tested area significantly reduced more than pre-application (P < 0.001) and the control (P < 0.001).”
“Topical application of nicotinamide increased ceramide and free fatty acid levels in the stratum corneum, and decreased transepidermal water loss in dry skin.”
Research describes the active mechanism and is not a claim about this specific product.
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Yes — its active compound is linked to 19 peer-reviewed studies, summarized and cited above.
You can buy it on Amazon via the link above; Magellan earns a small affiliate commission at no extra cost to you, which does not affect the evidence grade.
Dietary supplements and devices are generally well tolerated but are not a substitute for medical care. Talk to your physician before starting, especially if you take medication or have a health condition.