D-Isoascorbic acid Na salt is widely used as a food additive due to its antioxidant properties. It helps in preserving the color, flavor, and nutritional value of various food products, particularly in meat, fish, and canned goods. In the beverage industry, it is employed to prevent oxidation and extend shelf life. Additionally, it is used in the pharmaceutical sector as a stabilizer in certain medications. Its ability to inhibit the growth of bacteria and fungi also makes it useful in cosmetic formulations, where it acts as a preservative and enhances product stability.