Unverified85% confidenceTradeoffTime unknown
无机铁（硫酸亚铁）吸收率虽被有机铁反超，但胃部反应大，权衡：预算敏感且胃肠正常可选无机铁；胃肠敏感或需长期服用则选甘氨酸亚铁/柠檬酸亚铁等有机铁
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Unverified硫酸亚铁(二价铁)吸收率高但胃肠刺激大，甘氨酸亚铁螯合铁(bisglycinate)吸收率相当而便秘、恶心发生率显著降低，肠胃敏感者应优先选螯合铁91% similarUnverified铁的吸收率与耐受性存在权衡：硫酸亚铁吸收好但胃肠刺激大易致便秘恶心；富马酸亚铁、多糖铁复合物、甘氨酸亚铁螯合物温和但价格高。孕吐期优先选螯合铁或多糖铁配方91% similarUnverified吸收率与胃肠耐受性存在权衡：硫酸亚铁便宜吸收好但副作用大，螯合铁/多糖铁温和但价格高且元素铁含量往往偏低，需服用更多才能达到治疗量90% similarUnverified吸收率与胃肠道耐受性存在权衡：硫酸亚铁元素铁占比高、见效快但便秘恶心发生率高；甘氨酸铁温和但相同元素铁剂量下需服用更多胶囊、成本更高，轻中度缺铁者用甘氨酸铁体验更好90% similarUnverified吸收率与温和度的权衡：硫酸亚铁便宜、元素铁含量高但对肠胃刺激大易便秘；甘氨酸亚铁温和吸收好但价格高。急需纠正贫血选前者，长期日常保健选后者89% similar
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