Sulfite Parts

Sulfites are compounds containing sulfur and oxygen. They occur naturally in small amounts in some foods and are also produced by the body. For food use, sulfites are typically manufactured from sulfur dioxide.

Sulfites are added to foods primarily as preservatives to prevent spoilage and maintain color. They act as antioxidants, inhibiting browning in dried fruits and vegetables and preventing discoloration in wines and processed potatoes. They are often found in dried fruits, wine, and some processed meats.

In the US, sulfites are permitted food additives. Some individuals, particularly those with asthma, may experience sensitivity reactions to sulfites, ranging from mild skin rashes to severe respiratory distress. The FDA requires foods containing 10 parts per million or more of added sulfites to be labeled. JECFA and EFSA have evaluated sulfites and established acceptable daily intakes.