Used as a dietary supplement to prevent or treat calcium deficiency, supporting bone health and reducing the risk of osteoporosis. Commonly found in calcium supplements due to its relatively good absorption, especially in individuals with low stomach acid or when taken with food.

Also serves as a food additive, functioning as a buffer and preservative in processed foods and beverages, and employed in fortified foods and drinks to increase calcium content without significantly altering taste. It provides a compatible source of calcium in products like plant-based milks, grain beverages, and ready-to-eat foods due to its moderate solubility.

Used in pharmaceutical formulations as an excipient to enhance stability, solubility of certain drugs, or as a binder in tablets to improve disintegration in the stomach.

Additionally, utilized in oral care products such as toothpaste or enamel coatings to reduce calcium loss from tooth enamel and help prevent cavities.