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Quick answer: Sodium Sulfite carries the heavier risk profile. Sodium Sulfite is — in the EU and — in the US; Retinyl palmitate is restricted in the EU and allowed in the US.
| Property | Sodium Sulfite | Retinyl palmitate |
|---|---|---|
| EU status | — | Restricted |
| US status | — | Allowed |
| Risk level | — | medium |
| Banned in | — | — |
| Restricted in | United States (banned from fresh produce and salad bars per FDA 1986 action), European Union (ADI 0.7 mg/kg body weight as sulfur dioxide equivalent), Australia (mandatory labeling if above 10 ppm) | European Union |
| Category | additive | endocrine disruptor |
| Where it hides | — | anti-aging cream, sunscreen, lotion |
Sodium sulfite is an inorganic sulfite salt used as a food preservative and antioxidant. It releases sulfur dioxide when it contacts water or acid, which acts as the active antimicrobial and antioxidant agent. Part of the broader sulfite family of food additives (including sulfur dioxide E220, sodium bisulfite E222, and others).
Retinyl palmitate is a vitamin A ester used in anti-aging skincare and sunscreen.
Sodium Sulfite: Sulfites are among the more significant food allergy/intolerance triggers. An estimated 1 in 100 people, and up to 5% of asthmatics, are sulfite-sensitive. Reactions can include urticaria, angioedema, bronchospasm, and in severe cases anaphylaxis. Sulfite-induced asthma can be severe; several deaths attributable to sulfite-triggered anaphylaxis have been documented. The FDA banned sulfites from fresh produce and restaurant salad bars in 1986 after several deaths and severe reactions were linked to sulfite-treated salads. FDA mandates that sulfite content above 10 ppm be declared on US food labels. All forms of sulfites (E220-E228) share these sensitization concerns.
Retinyl palmitate: The EU caps vitamin A levels over concerns it may accelerate skin damage in sunlight; the US does not restrict it.
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