Derived from chitin, a polysaccharide found in the exoskeletons of shrimp, lobster, and crabs. There is extensive research showing it can be effective in skin restoring and soothing.
References for this information:
Journal of Pharmacy and Pharmacology, November 2002, issue 11, pages 1453–1459
International Journal of Food Microbiology, March 2002, issues 1-2, pages 65–72
Biomaterials, November 2001, issue 21, pages 2959–2966
Journal of Pharmacy and Pharmacology, August 2001, issue 8, pages 1047–1067