Potassium Sorbate And Metabisulfite

Potassium sorbate is the potassium salt of sorbic acid, a naturally occurring organic compound. It is typically produced industrially through the reaction of sorbic acid with potassium hydroxide. Metabisulfite is a salt of metabisulfonic acid, often produced from sulfur dioxide and potassium hydroxide or carbonate.

These compounds are commonly used together as preservatives in a wide variety of foods. Potassium sorbate inhibits the growth of mold, yeast, and some bacteria, while sulfites like potassium metabisulfite act as antioxidants and antimicrobials. They are often found in dried fruits, wines, baked goods, and processed meats.

Potassium sorbate is generally recognized as safe (GRAS) by the FDA. Potassium metabisulfite is also approved by the FDA as a food additive. Both have been evaluated by international bodies like JECFA and EFSA. While generally considered safe at typical consumption levels, sulfites can cause allergic-type reactions in sensitive individuals, particularly those with asthma.