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E221PreservativeModerate concern
Sodium Sulfite
In plain words
The short version
A sulfite preservative and antioxidant that releases SO2 to stop browning — a declared allergen above 10 mg/kg.
Why we flag it amber
A sulfite preservative. It's effective, but sulfites can set off asthma and other reactions in sensitive people, so they must be declared on labels. That's why we flag it.
Safety profile
Group ADI 0.7 mg/kg body weight as SO2 (shared by the sulfites). Sulfites can trigger asthma and reactions in sensitive people; declaration is mandatory above 10 mg/kg.
The detail
Educational information only. Not medical or dietary advice.