Unverified90% confidenceDecision RuleTime unknown
普通成人日常维持推荐1000-2000 IU/天；血检25(OH)D偏低（＜30 ng/mL）纠正阶段可短期用4000-5000 IU/天，长期不建议超过4000 IU上限
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Unverified普通成人日常维持推荐1000-2000IU/天，此剂量可满足绝大多数人将血清25-OH-D维持在30ng/mL以上；仅在明确缺乏（血清＜20ng/mL）时才短期使用5000IU纠正91% similarUnverified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5000IU88% similarUnverified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88% 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88% similar
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