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E211PreservativeModerate concern
Sodium Benzoate
In plain words
The short version
A water-soluble preservative effective in acidic foods, especially soft drinks and pickles.
Why we flag it amber
A very common preservative (sodium benzoate). It's approved, but with vitamin C in the same drink it can form traces of benzene (a carcinogen), and it triggers pseudo-allergic reactions in some people. Those caveats are why we flag it.
Safety profile
ADI of 5 mg/kg body weight. In the presence of ascorbic acid (vitamin C) and heat or light, sodium benzoate can form trace amounts of benzene, a known carcinogen. This interaction is the basis of ongoing reformulation efforts in the beverage industry.
The detail
Educational information only. Not medical or dietary advice.