Natural Occurring Sulfites

Sulfites are naturally occurring compounds containing sulfur and oxygen. They are found in small amounts in many foods, including fruits, vegetables, and grains. During fermentation, yeast and bacteria also produce sulfites.

Sulfites are added to foods as preservatives to prevent spoilage and maintain color. They act as antioxidants, protecting foods from browning and inhibiting the growth of bacteria and mold. Sulfites are commonly found in dried fruits, wine, baked goods, and some processed meats.

In the US, sulfites 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 to severe. Regulatory bodies like the FDA require sulfites to be declared on food labels when present above 10 parts per million. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated sulfites and established acceptable daily intakes.