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Source
Not animal-derived
Allergen
No
Role in food
Sulfur dioxide and sulfites act as preservatives in foods. They prevent spoilage by inhibiting …
What it is
Sulfur dioxide (SO2) is a gas. It is made by burning sulfur or by heating metal sulfides. In food, it is often used in the form of sulfites, such as sodium sulfite, sodium bisulfite, or potassium bisulfite.
Why it's used
Sulfur dioxide and sulfites act as preservatives in foods. They prevent spoilage by inhibiting the growth of bacteria, yeasts, and molds. They also act as antioxidants, preventing browning and maintaining color in dried fruits, juices, and processed potatoes.
Health notes
Sulfur dioxide and sulfites are permitted food additives in the U.S. and are generally recognized as safe (GRAS) by the FDA when used according to regulations. However, some individuals, particularly those with asthma, may be sensitive to sulfites and experience allergic-type reactions. Regulatory bodies like JECFA and EFSA have evaluated sulfites and established acceptable intake levels. Evidence regarding other health effects is mixed and under ongoing review.
Allergen info
Sulfur dioxide is not one of the 9 major FDA allergens. It does not contain gluten.
Note:
This site presents label data from USDA FoodData Central for general information. It is not medical advice.
Check the package label; formulations change.