Sodium erythorbate, erythorbic acid, sodium isoascorbate

Antioxidant, color retainer: Processed meat, beverages, baked goods, and potato salad.
Chemically, sodium erythorbate is stereoisomer of ascorbic acid (vitamin C), but it itself has no nutritional value. It is used most commonly in processed meats, where it retards nitrosamine formation and color fading.