角质层
Ginkgo biloba on the skin, the stratum corneum is obvious. 银杏叶的上表皮，具有明显的角质层。
It will increase the water content of the stratum corneum, so as to reduce the extent of the epidermal keratinocyte. 提高角质层的水分含量，使表皮角质化的程度减弱。
