Used as a dietary calcium supplement and antacid to treat heartburn and indigestion. Commonly added to toothpaste as a mild abrasive to help remove plaque and surface stains. Serves as a filler in the production of paper, plastics, and paints to improve texture and opacity. Employed in agriculture to neutralize acidic soils and enhance crop growth. Utilized in water treatment to adjust pH and reduce acidity in drinking water. Acts as a raw material in the manufacture of cement and lime in construction industries. Added to animal feed as a source of calcium for bone development and eggshell formation in poultry.