Sodium Metabisulfite
Ingredient Info
Sodium metabisulfite is a preservative and antioxidant used in skincare to prevent product spoilage and oxidation. It helps extend shelf life by protecting formulations from degradation caused by air and light exposure.
Benefits
- Preserves product stability and extends shelf life
- Prevents oxidation of other ingredients
- Approved for cosmetic use at standard concentrations
Potential concerns
- May cause irritation or allergic reactions in sensitive individuals, particularly those with sulfite sensitivities
- Can trigger reactions in people with asthma or sulfite allergies
- Not typically recommended for products applied to sensitive facial skin
Science: The Cosmetic Ingredient Review Expert Panel confirmed sodium metabisulfite is safe in cosmetic formulations at typical use concentrations (2023). However, research indicates it can affect cellular ion channels at higher concentrations; safety depends on the low levels used in skincare products.
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