北京怀柔区13～15岁青少年钙代谢实验研究

发布时间：2018-10-19 10:44

【摘要】：目的通过钙代谢平衡实验推算我国北方青少年钙的适宜摄入量。方法将北京怀柔区304名13~15岁青少年分为4组,其中一组为对照组,另外三组每天补充含钙量分别为300 mg,600 mg,900 mg的奶粉。连续补钙1年后,从每个组男、女生各随机抽取4人,共32人,进行钙代谢实验。实验期共6天,收集研究对象在实验期间内摄入的饮食、排出的尿液和粪便,采用原子吸收分光光度法测定样品钙含量。结果研究对象钙的表观吸收率为63.2%,男生为67.4%,女生为58.7%,差异无统计学意义。全部研究对象的钙储留量为770 mg/d时达到平台期(男生为790 mg/d,女生为600 mg/d),对应的最低钙摄入量为1400 mg/d(男生为1320 mg/d,女生为1200 mg/d)。结论为满足钙储留量的增长以及使机体保持较高的钙吸收的需要,建议青春期少年要保证每日能摄入800 mg~1000 mg的钙。
[Abstract]:Objective to estimate the suitable calcium intake of adolescents in North China by calcium metabolism balance experiment. Methods 304 130-year-old adolescents in Huairou District of Beijing were divided into 4 groups, one group was the control group, the other three groups were supplemented with milk powder with calcium content of 300 mg,600 mg,900 mg each day. After 1 year of continuous calcium supplementation, 4 men and 32 women were randomly selected from each group for calcium metabolism experiment. The subjects' diet, urine and feces were collected for 6 days. The calcium content of the samples was determined by atomic absorption spectrophotometry (AAS). Results the apparent absorption rate of calcium was 63.2%, 67.4% for boys and 58.7% for girls. The calcium storage capacity of all subjects reached plateau stage at 770 mg/d (790 mg/d, for males and 600 mg/d for females), and the minimum calcium intake was 1400 mg/d (1320 mg/d, for males and 1200 mg/d for females). Conclusion in order to meet the need of increasing calcium storage and keeping the body high calcium absorption, it is suggested that adolescents should be able to consume 800 mg~1000 mg of calcium a day.
【作者单位】：中国疾病预防控制中心营养与健康所;
【基金】：国家科技支撑课题(2008BAI58B02)
【分类号】：R151

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