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在发展中国家和某些低收入的人群中,居民中钙摄入低,是普遍的实际情况。其中儿童,由于正在生长发育阶段。需要量和成年人的相同或较成年人为多,而摄入的食物量一般又往往低于成年人,因此,钙的摄入量就更为不足。同时,还有某些食物因素,如蛋白质的数量不足、质量不全价、低脂肪、植酸、草酸和粗纤维含量高等都能影响钙的吸收和存留。矿物质之间的相互关系(量和比值)也影响钙的吸收和存留。而在骨骼和参与细胞代谢过程中,钙、磷、镁的作用是不能忽视的。
Among developing countries and certain low-income people, low calcium intake among residents is a common reality. Among them, children are in the stage of growth and development. The amount required is the same as for adults or adults, and the amount of food ingested is generally lower than for adults, so calcium intake is even less. At the same time, there are some food factors, such as insufficient protein quantity, incomplete price, low fat, phytic acid, oxalic acid and crude fiber content can affect the calcium absorption and retention. The interrelationship between minerals (amount and ratio) also affects the absorption and retention of calcium. In bone and participate in cell metabolism, the role of calcium, phosphorus, magnesium can not be ignored.