Niacinamide (vitamin B3) is a water-soluble vitamin used in skincare to support the skin barrier, regulate sebum, reduce hyperpigmentation, and improve the appearance of fine lines and redness. At 0.20% it is a low concentration, typically below the levels (2-5%) shown most effective in clinical studies.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient redness or flushing | Uncommon | Usually brief and dose-dependent; more likely at higher concentrations. |
Tingling, stinging, or burning sensation | Uncommon | Often transient on application, especially on sensitive or compromised skin. |
Dryness or mild irritation | Rare | Generally well tolerated; irritation reports increase with higher percentages. |
Allergic contact dermatitis | Very rare | Isolated case reports; true sensitization to niacinamide is uncommon. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.