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目的和方法目前尚不清楚，摄入非水溶性钙盐的钙吸收是否比摄入水溶性差的钙盐钙吸收更好；另外也不清楚，牛奶制品的钙吸收是否比钙盐钙吸收更好。作者采用一种单次服用就能精确测定钙的净吸收率的方法，给８例健康空腹受试者服用含５００mg钙的５种不同水溶性的钙盐和牛奶，?
Purposes and methods It is unclear whether calcium uptake by water-insoluble calcium salts is better absorbed than calcium salt calcium absorption by poorly water-soluble salts and whether the absorption of calcium by milk products is better than calcium-calcium absorption . The authors used a single administration to be able to accurately measure the net absorption rate of calcium method, to eight healthy fasting subjects taking 500mg calcium containing five different water-soluble calcium salt and milk?