Unverified84% confidenceDecision RuleTime unknown
孕期铁补充选二价铁（如甘氨酸亚铁/富马酸亚铁）吸收优于三价铁，且甘氨酸亚铁胃肠刺激小便秘少；维C可提升吸收，避免与钙、茶、咖啡同服，孕中晚期日需27mg
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84%
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Long-term
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Unverified孕中晚期营养包铁含量应达到每日27mg左右，且优先选择甘氨酸亚铁或富马酸亚铁等有机铁形态，比无机铁（硫酸亚铁）吸收率高且胃肠刺激小、不易便秘91% similarUnverified孕期铁需求量随孕周上升，孕中晚期每日约需27mg元素铁；甘氨酸亚铁/富马酸亚铁等有机铁比硫酸亚铁胃肠刺激小、吸收率更高，搭配维生素C可提升吸收91% similarUnverified铁剂选甘氨酸亚铁(双甘氨酸螯合铁)或多糖铁复合物比硫酸亚铁便秘和胃刺激明显更轻，孕中晚期(孕13周后)需铁量增至每日27mg，孕早期无缺铁则不必强补91% similarUnverified孕中晚期铁需求激增（孕晚期约27mg/天），选择每片含铁量18-27mg的产品；若血红蛋白正常且肠胃敏感，可选不含铁的复合维生素另行按需补铁，避免便秘和恶心90% similarUnverified选购时看铁含量：哺乳期铁需求虽低于孕期（约9mg/天），但产后失血需补铁，奶粉每100g铁含量≥8mg可辅助补充，配合维C促进吸收90% similar
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