Unverified88% confidenceDecision RuleTime unknown
VD每日推荐摄入量为400-800IU，VA不超过2000IU/日；选购时应确认单粒剂量在此范围内，避免长期超量导致维生素A蓄积中毒
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88%
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Unverified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79% similarUnverified日常预防性补充选1000-2000IU/天即可，5000IU属于纠正性剂量，仅在检测确认严重缺乏（血清25(OH)D＜20ng/ml）时短期使用，不建议长期无监测服用79% similarUnverified日常维持型补充选1000-2000IU/天即可；仅在检测出明显缺乏（血清25(OH)D<20ng/ml）且遵医嘱时才短期使用5000IU大剂量78% similarUnverified剂量为1000IU，对于医生建议每日补充2000-5000IU的严重缺乏者，需每天服用多粒，性价比较低78% similarUnverified普通成人日常预防补充选择1000-2000IU/天即可维持血清25-OH-D在30-50ng/mL的充足范围；仅在检测确认缺乏（<20ng/mL）时才需要5000IU/天的高剂量短期纠正78% similar
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