[KongchangAI]
Unverified85% confidenceCautionTime unknown

美白牙膏多含摩擦剂或过氧化物,长期高频使用可能增加敏感,旅行短期无碍;但脱敏型(含硝酸钾/氯化锶)需连续使用2-4周才起效,仅带几天旅行装无法解决牙敏感

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