Calcium carbonate is neither a base nor an acid; the substance is a salt.
First of all, we need to clarify the concepts of acids and bases. Those that release hydrogen ions when dissolved in water are called acids, and those that release hydroxyl radicals are called bases. Calcium carbonate rarely dissolves in water and is classified as a salt, but the hydrolysis of a small amount of carbonate dissolved in water will give the aqueous solution a very low alkalinity.
Calcium carbonate is mainly used for calcium supplementation in clinical practice, and the calcium tablets taken in daily life contain this ingredient. However, it should be noted that the absorption of calcium requires the help of vitamin D, which can be supplemented by taking vitamin D or sunbathing more often.
Note that hypercalcemia, hyperuricemia and allergies are prohibited, cardiac and renal insufficiency, kidney stones should be used with caution. It is recommended to use the drug as prescribed by the doctor.