Methods:Sebum content and skin hydration were measured on both forehead and flexor forearms of 325 normal Chinese with a Sebumeter 815 and Corneometer 820 respectively.

• 方法:利用皮肤表面皮脂测量仪和皮肤水分含量测量仪对我国北方325名正常人的前额及前臂屈侧皮肤皮脂量和皮肤含水量进行测量。