Vitamins And Minerals: Calcium Carbonate

Calcium carbonate is a common mineral found naturally in rocks, shells, and pearls. For use in food, it is often mined from limestone or produced synthetically. It typically appears as a fine white powder.

Manufacturers add calcium carbonate to foods primarily as a source of calcium to enrich or fortify products. It can also act as an anti-caking agent, a firming agent, or a white food coloring. It's frequently found in cereals, baked goods, and plant-based milk alternatives.

Calcium carbonate is generally recognized as safe (GRAS) by the FDA when used in accordance with good manufacturing practices. It is a common dietary supplement and food additive used to increase calcium intake, which is important for bone health. JECFA has evaluated calcium carbonate and determined that an acceptable daily intake (ADI) does not need to be specified, given its nature as a nutrient.