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Sodium Benzoate (Cosmetic) is permitted by the US FDA. Several countries restrict, warning-label, or have reviewed it for safety concerns. The US has more lenient additive rules than the EU, UK, Canada, and Japan, which is why this ingredient remains widely used here.
Sodium benzoate is considered safe for cosmetic use by the CIR and EU SCCS at regulated concentrations (≤2.5% in EU cosmetics). It is a weak sensitizer and can cause urticaria (hives) in some sensitive individuals. At low cosmetic concentrations, systemic risk is negligible — it is rapidly metabolized and excreted. The concern about sodium benzoate + ascorbic acid forming benzene is food-specific and not relevant to most cosmetic applications.
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