Sulfur Dioxide
This is what the ingredient is.
Sulfur dioxide is a chemical compound produced by burning sulfur or processing sulfur-containing ores. Used as a preservative gas or in solution form.
Here is why it shows up on the label.
Preservative and antioxidant in dried fruits, wine, molasses, and processed potatoes. Prevents browning and microbial growth. Also used as a bleaching agent.
Here is what food agencies say.
FDA GRAS with specific limits by food type. Must be declared if >10 ppm present. Europe sets a suggested daily limit of up to 0.7 milligrams per kilogram of body weight. Approved with mandatory labeling in US, EU, Canada.
Here is what research has found.
WHO/FAO reviewed safety in 2016. Studies show effective preservation of dried fruits. Research indicates stability during storage and processing.
Here are a few things worth knowing.
Major allergen - can trigger severe asthma attacks in sensitive individuals, particularly asthmatics. Mandatory allergen labeling required. Approximately 5-10% of asthmatics are sulfite-sensitive. Can cause headaches in sensitive individuals.
Sources
- FDA 21 CFR 182.3862
- WHO/FAO JECFA 2016
- Journal of Allergy Clinical Immunology 2014
How to read this page
We publish plain facts about this ingredient so a label is easier to read. This is not medical advice, and it is not a recommendation to buy, avoid, or use anything. For a personal health question, talk with a clinician who knows your history.