Unverified85% confidenceDecision RuleTime unknown
维C半衰期仅约30分钟,普通剂型血药浓度波动大,缓释剂型(Timed-Release/Slow-Release)能在6-8小时内持续释放,维持更平稳的血浆浓度,适合需要全天补充的人群
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Unverified缓释剂型(time-release)可将维C释放时间延长至6-8小时,维持血药浓度更平稳,适合每天只服1次的人群;普通片剂吸收快但2-3小时即排出93% similarUnverified缓释型维C(Time-Release)在4-6小时内持续释放,血药浓度更平稳、吸收率更高,适合需要全天补充或高剂量补充者;普通片剂大剂量时多余部分随尿排出91% similarUnverified缓释型(sustained-release)维C可维持血药浓度8-12小时,吸收利用率高于普通片剂一次性大剂量摄入(后者过量部分直接随尿排出),适合需要稳定补充的人群90% similarUnverified缓释型(sustained-release)维C将吸收时间延长至6-8小时,血浆浓度更平稳、尿液流失更少,适合需要全天维持者;但价格更高且部分研究显示缓释剂型的生物利用度略低于普通片剂89% similarUnverified缓释型(Time-Release)维C适合选大剂量(500mg以上)的人群,它将吸收分散到数小时内,血药浓度更平稳、肠道刺激更小,比普通片剂更适合空腹或胃敏感者85% similar
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