Sulphur Dioxide And Sodium Sulfite

Sulfur dioxide is a gas that occurs naturally in small amounts. Sodium sulfite is a salt made from sulfur dioxide. They are often produced industrially by reacting sulfur dioxide with sodium carbonate or sodium hydroxide.

Sulfites are used as preservatives in many foods, especially dried fruits, wines, and processed potatoes. They help prevent spoilage by inhibiting the growth of bacteria, yeasts, and molds, and also act as an antioxidant to maintain color and flavor.

Sulfites are approved for use in food by the FDA. Some individuals, particularly those with asthma, may be sensitive to sulfites and experience allergic-type reactions. Regulatory bodies like JECFA and EFSA have evaluated sulfites, and their use is permitted within specified limits. Evidence regarding widespread adverse effects in the general population at typical intake levels is mixed.