Unverified90% confidenceFactTime unknown
维生素D3的成人日推荐摄入量为600-800IU,可耐受最高摄入量(UL)为4000IU/天,长期超过UL无医学监测有中毒风险
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90%
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Long-term
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Unverified维生素D3成人日常补充常见400-2000IU,长期超过4000IU(成人安全上限)存在中毒风险(高钙血症、肾损伤),选购高IU大剂量产品需评估自身日照与膳食摄入总量90% similarUnverified维生素D3每日剂量建议在1000-2000IU区间用于日常维持,超过4000IU/天需在医生指导下使用,多数订阅套餐将D3设为800-1000IU属安全预防剂量88% similarUnverified维生素D3的生物利用度显著优于D2,选购时认准成分表标注为cholecalciferol(D3),日常补充剂量400-800IU即可满足成人需求,缺乏人群治疗剂量可达1000-2000IU/天87% similar
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