Liquid calcium is an emulsion calcium supplement made from milk, frozen at ultra-low temperature, and extracted and concentrated. There are more than forty kinds of calcium nutrition and fortification agents allowed internationally, of which solid calcium all have the potential to harm the stomach and have gas production, regurgitation and other symptoms of stomach discomfort. Liquid calcium, because the free procedure is simpler, more easily absorbed, higher safety advantages. So the main characteristics of liquid calcium: first, using non-polluted pasture milk, retaining the natural activity of milk calcium; second, ultra-fine liquid state, easy to take long-term is beneficial to health; third, liquid calcium has better molecular mobility than general calcium tablets, more easily absorbed by people. Its main physiological role is that it can form strong bones and teeth and promote children’s growth and development. It is especially important for children and adolescents to have normal calcification of teeth and bones, effectively reduce bone loss due to ageing, soothe the state of osteoporosis, help the nervous system to function and expand normally, and help regulate the heartbeat, and also participate in blood clotting. In addition, calcium supplements are best taken at night for better results.