Unverified83% confidenceTradeoffTime unknown
剂量越高单价越省但过量风险越大：5000IU比1000IU单粒更划算，但维生素D中毒（高钙血症）多因长期超4000IU且未监测导致，日常选择应以安全边际优先而非单价
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Unverified剂量越高见效越快但脂溶性维生素会在体内蓄积，长期超5000IU/天且不监测血药浓度有中毒（高钙血症）风险；日常维持低剂量更安全，高剂量应短期且复检82% similarUnverified脂溶性维生素（A/D/E/K）过量有蓄积中毒风险，维A长期摄入＞3000μg RAE、维D长期＞100μg（4000IU）需在医生指导下进行，选购时查看单粒剂量勿超UL上限80% similarUnverified含量高≠性价比高：高剂量（12mg以上）产品单粒成本陡增，但抗氧化效果存在边际递减，日常保健用4-6mg/天已覆盖多数研究有效区间，盲目追求高含量会显著抬高疗程成本80% similar
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