Niacinamide is a water-soluble form of vitamin B3 used in skincare to support the skin barrier, regulate sebum, and improve uneven tone and fine lines. It is a well-tolerated multifunctional active found in many serums and moisturizers.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient flushing or warmth | Uncommon | More likely at higher concentrations; usually brief and self-resolving. |
Tingling or stinging on application | Uncommon | Typically temporary, especially on sensitive or compromised skin. |
Redness or irritation | Rare | Often associated with high concentrations or combination with other actives. |
Allergic contact dermatitis | Very rare | Isolated case reports; presents as itching, rash, or swelling. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.