在儿童生长发育过程中,钙元素是非常重要的营养素之一。钙占人体总量的1.5%~2.0%,其中99%存在于骨骼中。钙对骨骼结构的形成和维持是极其重要的,缺乏钙元素可能会影响骨骼的生长发育过程[1]。钙缺乏的临床表现主要有睡眠不安、易惊、多汗,年长儿可出现腿疼。适量补充钙剂在钙缺乏的治疗中起着关键的作用。复合钙颗粒剂Ⅲ号(以下简称复合钙Ⅲ)作为常用的钙补充剂,在首都儿科研究所 Calcium is one of the most important nutrients in children’s growth and development. Calcium accounts for 1.5% -2.0% of the total human body, of which 99% exists in the bones. Calcium is extremely important for the formation and maintenance of skeletal structures. The lack of calcium may affect the growth and development of bone [1]. The main clinical manifestations of calcium deficiency restlessness, easy to panic, sweating, older children may appear leg pain. Moderate calcium supplementation plays a key role in the treatment of calcium deficiency. Compound calcium granules Ⅲ (hereinafter referred to as calcium complex Ⅲ) as a commonly used calcium supplements in the capital Institute of Pediatrics