“…The purpose of this review is to 83 summarize the data about drug delivery systems based on glycerol 84 monooleate liquid crystalline phases (Amar-Yuli et al, 2009;Caboi 85 et al, 2001;Chernik, 1999;Drummond and Fong, 1999;Engström, 86 1990;Fong et al, 2012;Garti et al, 2012;Guo et al, 2010;Hitesh 87 et al, 2011;Kaasgaard and Drummond, 2006;Kulkarni et al, 2011;88 Larsson, 2009;Leser et al, 2006;Sagalowicz et al, 2006a,b;Shah 89 et al, 2001). Furthermore, glycerol monooleate is a nontoxic, biodegradable 109 and biocompatible material, classified as GRAS (generally recog-110 nized as safe) and it is included in the FDA Inactive Ingredients 111 Guide (Bode et al, 2013;Ganem-Quintanar et al, 2000;Matschke 112 et al, 2002). One important aspect of the use of glycerol 113 monooleate as a safe parenteral material is the necessity to 114 confirm its biological tolerance.…”