Sulfiting Agents

Sulfiting agents are compounds containing sulfur dioxide. They occur naturally in small amounts in some foods and are also produced synthetically. These agents are commonly used in food processing.

Sulfiting agents are added to foods to prevent browning, inhibit microbial growth, and act as a preservative. They help maintain the fresh appearance and extend the shelf life of various products, especially dried fruits, wines, and processed potatoes.

In the US, sulfites are regulated by the FDA as a food additive. They are known to cause allergic-type reactions in some individuals, particularly those with asthma. The FDA requires products containing more than 10 parts per million of sulfites to declare their presence on the label. JECFA and EFSA have evaluated sulfiting agents and established acceptable daily intake levels.