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缬草根提取物需选择标准化到0.8%缬草酸(valerenic acid)的产品，且单次剂量300-600mg才具助眠证据支持，低于300mg多为无效添加

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Unverified缬草根提取物有效剂量为300-600mg（标准化含0.8%缬草酸），低于300mg难以产生助眠效果，选购时看标签是否标注valerenic acid百分比96% similar Unverified缬草提取物助眠需选择标准化至0.8%缬草酸(valerenic acid)的产品，有效剂量为300-600mg/次，低于此浓度或未标注标准化含量的产品通常疗效不确定96% similar Unverified缬草根提取物需选择标准化到0.8%缬草酸（valerenic acid）的规格，日剂量需达到300-600mg干燥提取物才具临床助眠效果，低于300mg基本无效95% similar Unverified缬草提取物助眠有效剂量为每日300-600mg标准化提取物（含0.8%缬草酸），低于300mg临床证据不足，选购时需看标注是否达到有效剂量而非仅看总重量91% similar Unverified缬草根（Valerian）含量达到300-600mg/份时才有临床验证的助眠效果，市售调味茶多为点缀性添加（＜50mg），选购需看'缬草根'排在配料表前3位82% similar

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