Abstract Minerals play important roles in infant growth and development, even though they only make up to 0.2 g% of the mature breast milk contents. Limited studies examined the association between maternal dietary intake and breast milk mineral contents in a temporal manner. Twenty Malaysian Malay postpartum mothers were recruited by either convenience or snow balling sampling from the urban lower middle income residential areas. Dietary intake of the subjects was obtained by 24-hour recall during each breast milk collection. Adequacy of maternal mineral intake was compared with the latest Recommended Nutrient Intake for Malaysia. Each of the subject provided breast milk samples for three times (T1, T2, and T3) at consecutive 2-week intervals. Breast milk concentrations of selected macro- and micro-minerals, including Ca, P, K, Na, Mg, Fe, Zn, Cu, Mn, Se, I, Cr and Mo were determined by inductively coupled plasma mass spectrometry (ICP-MS). Subjects were aged 31.4 ± 6.1 years with a majority (60 %) having post-secondary school/ college education. While maternal intake of macro-minerals, Ca, P, K and Mg, did not display a significant temporal changes from T1 to T3, the intake of micro- minerals, Cu, Mn and I decreased significantly over time from T1 to T3. Breast milk K, Fe, Zn and Cu concentrations showed a significant decreased with the progression of lactation from transitional (2–3 weeks) to established stage (>8-12 weeks). Significant correlations were established between maternal intake of K, Na, Fe and Se and their respective concentrations in breast milk in the present study. This case study revealed an inadequate maternal intake of several key micro- minerals (Cu, Mn, I) among the postpartum Malay mothers and a decreasing concentrations of certain essential minerals (K, Fe, Zn and Cu) in breast milk with lactation stage.

中文翻译：

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母亲膳食摄入量随时间变化的案例研究及其与母乳矿物质含量的关系

摘要 矿物质在婴儿生长发育中起着重要作用，尽管它们仅占成熟母乳含量的 0.2 g%。有限的研究以时间方式检查了母亲膳食摄入量与母乳矿物质含量之间的关联。二十名马来西亚马来产后母亲是通过便利或滚雪球抽样从城市中低收入住宅区招募的。在每次母乳收集期间，通过 24 小时召回获得受试者的膳食摄入量。将孕妇矿物质摄入量与马来西亚最新的推荐营养摄入量进行比较。每个受试者以连续 2 周的间隔提供 3 次（T1、T2 和 T3）母乳样本。母乳中选定常量和微量矿物质的浓度，包括 Ca、P、K、Na、Mg、Fe、Zn、Cu、Mn、Se、I、Cr 和 Mo 通过电感耦合等离子体质谱法 (ICP-MS) 测定。受试者的年龄为 31.4 ± 6.1 岁，大多数 (60%) 具有大专/大学教育。虽然母体摄入的大量矿物质 Ca、P、K 和 Mg 从 T1 到 T3 没有显示出显着的时间变化，但微量矿物质 Cu、Mn 和 I 的摄入量从 T1 到 T3 随时间显着减少。随着哺乳期从过渡期（2-3 周）到成熟期（>8-12 周），母乳中 K、Fe、Zn 和 Cu 的浓度显着降低。在本研究中，母亲摄入的 K、Na、Fe 和 Se 与它们各自在母乳中的浓度之间建立了显着的相关性。该案例研究揭示了母亲对几种关键微量矿物质（铜、锰、