钙是人体必需的一种元素,参与骨质的代谢和心肌、血管、气管、胃肠道平滑肌及骨骼肌的收缩与舒张,因此人们越来越注意到膳食中加钙的重要性。但是人们不甚了解,其实营养素都有一个安全摄入范围,膳食中的钙摄入也有一个安全范围。一般而言,每 Calcium is an essential element of the human body. It is involved in the metabolism of bone and the contraction and relaxation of the myocardium, blood vessels, trachea, smooth muscles of the gastrointestinal tract and skeletal muscles. Therefore, people are increasingly aware of the importance of calcium in the diet. However, people do not quite understand that, in fact, nutrients have a safe intake range, and calcium intake in the diet also has a safe range. In general, every