Niacinamide is a water-soluble form of vitamin B3 used in topical skincare to support the skin barrier, regulate sebum, reduce hyperpigmentation, and improve signs of aging. It is generally well tolerated across a wide range of concentrations.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient flushing or warmth | Uncommon | More associated with higher concentrations; usually self-limiting. |
Stinging, tingling, or irritation | Uncommon | More likely in sensitive skin or at higher concentrations. |
Redness (erythema) | Rare | Typically resolves with reduced frequency or concentration. |
Allergic contact dermatitis | Very rare | Rarely reported; patch testing can confirm sensitivity. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.