[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

含烟酰胺的美白霜浓度2%-5%为有效区间,超过5%易引起泛红刺痛;敏感肌应从2%起建立耐受,连续使用4-8周才见明显提亮效果

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Long-term
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