Sulfur Dioxide Sodium Metabisulfite

Sulfur dioxide and sodium metabisulfite are chemical compounds that contain sulfur. They are often used together or interchangeably in food processing. They are produced industrially through chemical reactions.

These compounds act as preservatives and antioxidants in food. They help prevent spoilage by inhibiting the growth of bacteria and molds, and they stop foods from browning. They are commonly found in dried fruits, wine, and some processed snacks.

Sulfur dioxide and 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, and regulatory bodies have established labeling requirements for foods containing them.