Refers to ingredients marketed to reduce hyperpigmentation and enhance skin radiance, typically by inhibiting melanin synthesis or promoting cell turnover (e.g., niacinamide, vitamin C, alpha arbutin). Effects on dark spots develop gradually over weeks of consistent use.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient irritation or stinging | Common | Often seen on first applications, especially at higher concentrations or low pH. |
Dryness or flaking | Uncommon | More likely when combined with exfoliating or other potent actives. |
Erythema (redness) | Uncommon | Usually subsides as skin acclimates. |
Allergic contact dermatitis | Rare | Patch testing advised in sensitive individuals. |
Paradoxical hyperpigmentation or irritation-induced darkening | Rare | Can occur in darker skin tones with overuse or strong formulations. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.