Cetearyl glucoside is formed by the condensation of cetearyl alcohol (fatty acid) with glucose. Can be naturally derived (from coconut/corn oil) or chemically synthesized. An emulsifier used in oil in water formulations. It helps skin and hair retain moisture, and gives a velvety after touch. You can find it in a variety of cosmetic products such as facial moisturizer, sunscreen, anti-aging treatment, eye cream, foundation, conditioner, body firming lotion, hand cream and cleanser.
Int J Cosmet Sci. 2014 Feb;36(1):79-87. doi: 10.1111/ics.12099.