Calcium diascorbate is widely used as a food additive, primarily for its antioxidant properties. It helps prevent oxidation in various food products, extending their shelf life and maintaining freshness. Commonly added to meats, dairy, and baked goods, it inhibits the formation of harmful compounds and preserves color, flavor, and nutritional value.

In the pharmaceutical industry, it serves as a source of vitamin C, aiding in the treatment of vitamin deficiencies and supporting immune function. Its calcium content also makes it beneficial for bone health, often included in dietary supplements.

Additionally, it is utilized in cosmetics and skincare products for its antioxidant effects, protecting the skin from free radical damage and promoting a healthier complexion. Its stabilizing properties make it a valuable ingredient in formulations requiring long-term efficacy.