Unverified90% confidenceDecision RuleTime unknown
成人常规维持推荐1000-2000IU/天；血清25-OH-D<20ng/ml的明确缺乏者可短期用5000IU/天纠正并3个月后复查；400IU仅够预防佝偻病级别，对多数成年缺乏者不足
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Unverified成人日常维持推荐1000-2000IU/天；血清25(OH)D<20ng/ml的明确缺乏者可短期用5000IU纠正，但5000IU不建议无检测长期服用，成人长期安全上限约4000IU/天92% similarUnverified无缺乏的健康成人日常维持推荐1000-2000IU/天；血清25-OH-D＜20ng/ml（缺乏）需在医生指导下短期用5000IU/天纠正，纠正后回落到维持量，不宜长期高剂量91% similarUnverified维持性补充选1000-2000IU/日即可满足多数成年人需求；血清25-OH-D<20ng/ml的明确缺乏者可短期用5000IU/日纠正，纠正后降至维持量，不建议长期无监测服用5000IU91% similarUnverified普通成人日常维持选择1000-2000IU/天即可；血清25-OH-D严重缺乏（<20ng/ml）时才需5000IU/天短期强化，且应在补充2-3个月后复查血清水平再调整剂量90% similarUnverified血清25-OH-D正常者日常维持选400-1000IU；检测显示缺乏（＜20ng/mL）需在医生指导下短期用2000-5000IU纠正，达标后降回维持量，不建议长期自行服用5000IU89% similar
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