A synthetic amino acid derivative that functions as a skin conditioning and oil-control agent and may play a role in enhancing the penetration of other ingredients. Research has shown that sarcosine can help minimize the impact UV light exposure has on skinŠ—Ès surface, so you may find it included in various types of sunscreen. ItŠ—Ès considered non-sensitizing. References for this information:
Journal of Controlled Release, January 2013, pages 91-100
International Journal of Toxicology, July-August 2012, pages 358-363
Skin Pharmacology and Physiology, January 2007, pages 155-161