Unverified83% confidenceTradeoffTime unknown

维生素C每次摄入超过200mg后吸收率急剧下降，单次1000mg吸收率不足50%，缓释剂型或分次服用比单次大剂量更有效

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维生素补充剂category

Related Claims

Unverified缓释型（Time-Release）维生素C能延长血浆浓度维持时间，单次摄入500mg以上时吸收率优于普通片剂；普通剂型单次超过200mg后吸收率开始明显下降，多余部分经尿液排出85% similar Unverified每片仅含100mg维生素C，对于需要大剂量补充（如感冒期间短期冲击量500-1000mg）的用户来说效率较低，需一次吃多片80% similar

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