在 4 周观察中，敏感性皮肤与干性一样属于基线最弱、改善幅度最大的一组，说明方向正确时修护空间很大。

内层常用舒缓类 INCI 包括：红没药醇、积雪草提取物、烟酰胺（低耐受起步）、神经酰胺信号分子。

关键提醒：敏感性皮肤应坚持耐受渐进——新增任何产品都从低频、小面积开始观察。

In the 4-week observation, sensitive skin, like dry skin, had the weakest baseline and the largest improvement — the repair potential is large when the direction is right.

Key rule: introduce anything new at low frequency on a small area first.