Allantoin
Glyoxyldiureide,
Allantion
Formula: C4H6N4O3
Molecular Weight: 158.12
Cas No：97-59-6
Skin conditioning; Skin Protecting; Soothing
[1] Wikipedia, the free encyclopedia, http://en.wikipedia.org.
[2] 行政院衛生署，署授食字第0991601266號公告，2010/03/08。
[2] 行政院衛生署，署授食字第0991601266號公告，2010/03/08。
尿囊素是一種優質的化妝品原料，添加尿囊素的化妝品具有潤膚、保護皮膚組織、親水、吸水和防止水分散失等作用，使肌膚更加柔軟和富有彈性
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.