保湿化妆品与皮肤科学

EMOLLIENT COSMETICS AND SKIN SCIENCE

许多皮肤病与表皮屏障功能障碍有关。角质形成细胞与细胞间质形成墙学说,它们牢固地粘着与防止水分丢失。当表皮屏障功能障碍,真皮和表皮内水分会大量丢失,发生皮肤干燥、鳞屑、瘙痒。保湿剂能修复表皮屏障功能,以表皮内存在的天然保湿因子作保湿剂原料最佳。它们是神经酰胺,PCA和尿素等。

Many skin diseases relate to the obstruction of the epidermal barrier. Like a wall, keratinocytes and cells interste firmly stick together to prevent water loss. When the epidermal barrier is blocked, water in dermis and epidermis will lose , which results in dry skin and skin scales. Humactants can restore the epidermal barrier. The best way to restore the epidermal barrier is to use the natural moisturizing factor (NMF)in epidermis as the moisturizing ingredients. Those factors include ceramide, PCA, lactic acid and urea et al.