A sulfite and derivative of sulfur dioxide used as a preservative, antioxidant, stabilizer, and bleaching agent in food and drinks. Commonly found in beer, wine, cider, and juice.
Some people are sensitive to sulfites and can have serious reactions to them ranging from wheezing to potentially life-threatening anaphylactic reactions. As a result, sulfites should be avoided by anyone with a sulfite allergy or sensitivity. People with asthma have between a 1 in 20 to 1 in 100 chance to having a sulfite reaction.
Scientific Opinion on the re-evaluation of sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222), sodium metabisulfite (E 223), potassium metabisulfite (E 224), calcium sulfite (E 226), calcium bisulfite (E 227) and potassium bisulfite (E 228) as food additiveshttps://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/j.efsa.2016.4438