Johnson P E, Evans G W
Am J Clin Nutr. 1978 Mar;31(3):416-21. doi: 10.1093/ajcn/31.3.416.
The concentration and bioavailability of zinc was analyzed in 10 varieties of milk. The concentration of zinc averaged 4.1 microgram/ml in unprocessed (raw) cow's milk; fortified infant formulas contained about 3 to 5 microgram Zn/ml; human breast milk and processed cow's milk contained approximately 2 microgram Zn/ml; sweetened condensed milk contained 1.3 microgram Zn/ml, and reconstituted nonfat dry milk contained 0.4 microgram Zn/ml. The mean values for zinc bioavailability to rats were as follows: sweetened condensed milk = 66%; human breast milk 59.2%, processed cow's milk = 43.7 to 50.9%; unprocessed (raw) cow's milk = 42%; nonfat dry milk = 41.2%, and infant formulas = 26.8 to 39.5%. Assuming similar absorption of zinc in rats and humans, our experimental results provide some guidelines for estimating the quantity of zinc that would actually be absorbed from various types of milk.
对10种牛奶中的锌浓度和生物利用度进行了分析。未加工（生）牛奶中锌的平均浓度为4.1微克/毫升；强化婴儿配方奶粉中锌的含量约为3至5微克/毫升；人母乳和加工后的牛奶中锌的含量约为2微克/毫升；甜炼乳中锌的含量为1.3微克/毫升，复原脱脂奶粉中锌的含量为0.4微克/毫升。锌对大鼠的生物利用度平均值如下：甜炼乳为66%；人母乳为59.2%，加工后的牛奶为43.7%至50.9%；未加工（生）牛奶为42%；脱脂奶粉为41.2%，婴儿配方奶粉为26.8%至39.5%。假设大鼠和人类对锌的吸收情况相似，我们的实验结果为估算从各类牛奶中实际吸收的锌量提供了一些指导原则。
