Substance typically found in plant and animal lipids (fat). Fatty acids include compounds such as glycerides, sterols, and phospholipids. They are used in cosmetics as emollients, thickening agents, and, when mixed with glycerin, cleansing agents. (Sources: Free Radical Research
, April 2002, pages 471–477; and Journal of Lipid Research
, May 2002, pages 794–804).
natural moisturizing factor (NMF)