Sodium Metabisulfite And Sodium Sulfite

Sodium metabisulfite and sodium sulfite are inorganic salts that are chemically related. They are produced industrially through chemical reactions involving sulfur dioxide.

These compounds act as preservatives and antioxidants in food. They help prevent spoilage by inhibiting the growth of bacteria and fungi, and also prevent browning in dried fruits and vegetables. They are commonly found in dried fruits, wine, processed potatoes, and some seafood.

Sodium metabisulfite and sodium sulfite are generally recognized as safe (GRAS) by the FDA for use as preservatives. They can cause allergic-type reactions in some individuals, particularly those with asthma. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated sulfites and established an acceptable daily intake. Evidence on other health effects at typical intake levels is mixed, and ongoing research continues.