Allantoin
Glyoxyldiureide,
Allantion
尿囊素
分子式：C4H6N4O3
分子量：158.12
Cas No：97-59-6
肌肤调理剂、肌肤防护剂、抚慰，自紫草(Comfrey)中提取而成，具有抗炎、舒缓及帮助肌肤组织再生之功能，常见于除粉刺、日晒修护类的产品成份中[1]。
卫生署规定浓度限量 0.2%~0.5%，添加于使用后非立即沖洗制品时，此含量属含药化粧品需申请[2]。
卫生署规定浓度限量 0.2%~0.5%，添加于使用后非立即沖洗制品时，此含量属含药化粧品需申请[2]。
[1] Wikipedia, the free encyclopedia, http://en.wikipedia.org.
[2] 行政院卫生署，署授食字第0991601266号公告，2010/03/08。
[2] 行政院卫生署，署授食字第0991601266号公告，2010/03/08。
尿囊素是一种优质的化妆品原料，添加尿囊素的化妆品具有润肤、保护皮肤组织、亲水、吸水和防止水分散失等作用，使肌肤更加柔软和富有弹性
Super common soothing ingredient. It can be found naturally in the roots & leaves of the comfrey plant, but more often than not what's in the cosmetic products is produced synthetically.
It's not only soothing but it' also skin-softening and protecting and can promote wound healing.