Sodium Metabisulfite & Sodium Sulfite

Sodium metabisulfite and sodium sulfite are inorganic salts that are chemically related. They are produced industrially and are commonly used as preservatives in food and beverages. They work by preventing oxidation and inhibiting the growth of microorganisms.

These sulfites are added to foods to prevent spoilage and maintain color. They act as antioxidants, protecting ingredients from breaking down due to exposure to air. They are often found in dried fruits, wine, processed meats, and some baked goods.

Sodium metabisulfite and sodium sulfite are permitted food additives in the US, 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 can experience allergic-type reactions. JECFA and EFSA have evaluated sulfites and established acceptable daily intakes. Evidence for widespread adverse effects in the general population at typical intake levels is mixed.