Sodium Bisulfite & BHT

Sodium bisulfite is a chemical compound used as a preservative and antioxidant. It is made by combining sulfur dioxide gas with a solution of sodium carbonate or sodium hydroxide. BHT (butylated hydroxytoluene) is a synthetic antioxidant also used to prevent spoilage.

Sodium bisulfite is added to dried fruits, wines, and processed potatoes to prevent browning and inhibit microbial growth. BHT is used in fats, oils, and many processed foods to prevent rancidity and extend shelf life. Both are commonly found in baked goods, cereals, and snack foods.

Sodium bisulfite is an FDA-approved additive and is generally recognized as safe (GRAS) when used as a preservative. However, it can cause allergic reactions in sensitive individuals, particularly those with asthma. BHT is also an FDA-approved food additive. Some studies have raised questions about BHT's long-term effects, but regulatory bodies like the FDA have not set limits on its use in food. JECFA and EFSA have evaluated both substances.