[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

备孕阶段的复合维生素铁含量不宜过高(建议≤18mg),孕前铁需求远低于孕中晚期,且高铁易引起便秘和恶心;真正需要补铁到27mg以上是孕期及确诊缺铁性贫血后

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