Sulfites Naturally Occurring

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

Sulfites are added to foods to prevent browning, inhibit microbial growth, and preserve freshness. They are commonly found in dried fruits, wines, processed potatoes, and some baked goods.

In the US, sulfites are permitted as preservatives and are generally recognized as safe (GRAS) when used according to good manufacturing practices. However, some individuals, particularly those with asthma, may experience sensitivity reactions to sulfites, ranging from mild symptoms to severe allergic-type responses. Regulatory bodies like the FDA and international organizations such as EFSA have evaluated sulfites. The FDA requires products containing added sulfites above 10 parts per million to list them on the ingredient label.