Unverified90% confidenceDecision RuleTime unknown
选择含维生素D3的复合钙剂优先，D3每100-400IU可显著提升钙吸收率，单纯补钙不含D3时钙吸收利用率大幅下降
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90%
Confidence
Long-term
Relevance
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Unverified选购钙剂优先看是否含维生素D3（而非D2），D3每片含量400-800IU可显著提升钙吸收率约30-40%；缺D3的纯钙剂吸收效率大打折扣97% similarUnverified含维生素D3的钙片优于纯钙片，D3促进钙吸收，选择每片含维生素D3 200-400IU的产品更利于钙利用95% similarUnverified选购时看维生素D3含量而非仅看钙含量：D3每日400-800IU可提升钙吸收30-40%，无D3的纯钙产品实际利用率偏低95% similarUnverified钙吸收需维生素D3协同，选择含D3的复合液态钙（成人每日400-800IU）优于纯钙，若产品未含D3则需额外补充，否则钙吸收率大幅下降95% similarUnverified钙强化产品需选择添加维生素D3的款式（≥0.75μg/100ml），维生素D促进钙吸收，缺乏时补钙效果大打折扣；部分产品仅强化钙而无维D，实际吸收率低94% similar
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