Naturally Occuring Sulfites

Sulfites are naturally occurring compounds found in small amounts in many foods, including fruits, vegetables, and grains. They are also produced during fermentation, such as in wine and beer. In food processing, sulfites can be added as preservatives.

When added to foods, sulfites act as a preservative by preventing spoilage and maintaining color. They are commonly found in dried fruits, wine, processed meats, and some baked goods to extend shelf life and improve appearance.

In the US, sulfites are generally recognized as safe (GRAS) by the FDA when used according to good manufacturing practices. However, some individuals, particularly those with asthma, may be sensitive to sulfites and experience allergic-type reactions. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) and the European Food Safety Authority (EFSA) have evaluated sulfites, establishing acceptable daily intakes. Evidence regarding the link between sulfite sensitivity and asthma is mixed, with some studies showing a correlation and others not.