Karra M V, Kirksey A, Galal O, Bassily N S, Harrison G G, Jerome N W
Department of Foods and Nutrition, Purdue University, West Lafayette, IN 47907.
Am J Clin Nutr. 1988 Apr;47(4):642-8. doi: 10.1093/ajcn/47.4.642.
Effects of stage of lactation, nutrient intake, and cultural differences on the composition of human milk were examined during the first 6 mo of lactation in American and Egyptian women. In both population groups zinc levels in milk decreased from 1 to 6 months of lactation. American women supplemented with Zn had higher levels of Zn in their milk than did unsupplemented American or Egyptian women. Concentrations of calcium and magnesium were not significantly different in milk of American and Egyptian women except at month 6 of lactation. Ca levels in milk of both population groups increased from 1 to 2-3 mo of lactation and then decreased at 6 mo; Mg concentrations increased from 1 to 3 mo and then reached a plateau. Similarities in the longitudinal decrease observed in Zn levels of milk in Zn supplemented and unsupplemented subjects suggested physiological regulation.
在美国和埃及女性哺乳期的前6个月，研究了泌乳阶段、营养摄入和文化差异对母乳成分的影响。在这两个人群组中，母乳中的锌含量在泌乳1至6个月期间均有所下降。补充锌的美国女性母乳中的锌含量高于未补充锌的美国女性或埃及女性。美国和埃及女性母乳中的钙和镁浓度除在泌乳第6个月外无显著差异。两个人群组母乳中的钙含量在泌乳1至2 - 3个月时增加，然后在6个月时下降；镁浓度从1个月增加到3个月，然后达到稳定水平。补充锌和未补充锌的受试者母乳中锌含量纵向下降的相似性表明存在生理调节。
