[KongchangAI]
Unverified80% confidenceDecision RuleTime unknown

维生素C极易氧化,避光遮光包装(棕色瓶/铝箔独立包装)比透明瓶更能保持活性;开封后大瓶装若数月才能用完,其后期实际含量可能因氧化而下降,购买规格应匹配3-6个月用量而非盲目追求大包装性价比

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80%
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Long-term
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