Superseded85% confidenceCautionTime unknown
含维生素A（视黄醇形式）过高的代餐不建议孕妇长期食用，孕期视黄醇摄入过量（＞3000μg/天）有致畸风险，应选以β-胡萝卜素形式补充维A的产品
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This knowledge claim has been superseded by newer content
孕妇每日预生成维生素A（视黄醇形式）不应超过3000μg RAE，过量视黄醇有明确致畸风险；孕期补充应优先选择β-胡萝卜素形式或直接选用专门的孕妇复合维生素Sources
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