Antioxidant: Sulfur Dioxide
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What it is
Sulfur dioxide is a gas that occurs naturally in small amounts. It is often produced industrially by burning sulfur. It is commonly used in its salt forms, sulfites, which are produced by reacting sulfur dioxide with water or alkali.
Why it's used
Sulfur dioxide and its salts, sulfites, are used as preservatives in many foods and beverages. They prevent spoilage by inhibiting the growth of bacteria, yeasts, and molds. They also act as antioxidants, preventing browning and preserving color in dried fruits, vegetables, and wines.
Health notes
Sulfur dioxide and sulfites are generally recognized as safe (GRAS) by the FDA when used as preservatives. 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 established acceptable daily intakes. Evidence regarding adverse effects in the general population at typical intake levels is mixed.
Allergen info
Sulfur dioxide is not derived from any of the nine FDA major allergens. It does not contain gluten.