Sodium sulfite is an inorganic salt used in cosmetic formulations primarily as an antioxidant and preservative to prevent oxidation and discoloration of products. It is generally considered a formulation ingredient rather than a treatment active.
| Reported effect | How often | Notes |
|---|---|---|
Allergic contact dermatitis | Uncommon | Sulfites are recognized contact allergens; sensitized individuals may develop localized eczematous reactions. |
Skin irritation | Uncommon | Can cause mild stinging, redness, or irritation, particularly at higher concentrations or on compromised skin. |
Urticaria/contact urticaria | Rare | Hives or immediate-type reactions have been reported in sulfite-sensitive individuals. |
Systemic hypersensitivity reactions | Very rare | Sulfite-sensitive individuals (often those with asthma) may rarely experience broader hypersensitivity responses. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.