小儿处于不断生长发育中,需要经常补充各种营养素。在各种无机盐中,最容易缺乏的是铁、锌和钙。因此一些医生经常会劝告家长买些钙粉、钙片给孩子吃。那么,小儿是否都需要补钙呢?身体中99%的钙存在于骨骼和牙齿中,钙使得骨骼和牙齿保持坚硬。在血液和其他组织中的钙,虽然只有1%,但对于促进血液凝固、维持心肌收缩、保障神经功能等都有十分重要的作用。乳类和海产品中含钙较多,每100克牛奶中含钙102毫克,两瓶半牛奶便可满足一个3岁以下孩子一天的需要量。母乳中的钙吸收率优于牛乳,因此母乳喂养的孩子较少发生缺钙。水产品中的虾皮、海带、鱼骨粉等都是良好的钙质来源,每100克虾皮含钙高达1760毫克。大豆含钙也不少,但其表皮中含有较 Children in constant growth and development, need to regularly add a variety of nutrients. Of the various inorganic salts, iron, zinc and calcium are the most easily absent. Therefore, some doctors often advise parents to buy some calcium powder, calcium for children to eat. So, do children need calcium supplements? 99% of the body’s calcium is found in bones and teeth, and calcium keeps the bones and teeth hard. Although calcium is only 1% in blood and other tissues, it plays an important role in promoting blood coagulation, maintaining myocardial contraction, and protecting nerve function. Milk and seafood contain more calcium, 102 mg of calcium per 100 grams of milk, two bottles of half milk to meet the needs of a child under 3 years of age. The calcium absorption rate in breast milk is better than milk, so breast-feeding children less calcium deficiency occurs. Aquatic shrimp, kelp, fish bone meal are all good sources of calcium, calcium per 100 grams of shrimp up to 1760 mg. Soybean is also a lot of calcium, but the epidermis contains more