Sodium Metabisulfite Retention

Sodium metabisulfite is a white or slightly yellow crystalline powder. It is a salt of sulfurous acid, made by reacting sulfur dioxide with sodium carbonate or sodium hydroxide. It is commonly used as a preservative and antioxidant.

Sodium metabisulfite is added to foods to prevent spoilage by inhibiting the growth of bacteria and molds. It also acts as an antioxidant, preventing browning and preserving the color and flavor of foods. It is often found in dried fruits, wine, and processed potatoes.

Sodium metabisulfite is generally recognized as safe (GRAS) by the FDA when used as a preservative. It can cause allergic reactions in some individuals, particularly those with asthma. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated sodium metabisulfite and established an acceptable daily intake. Evidence regarding its long-term health effects at typical consumption levels is mixed, with some studies suggesting potential adverse effects while others find no significant issues.