In order to investigate the inhibitory effect of glycoprotein fraction from spinach (GFS) on lipid digestion, emulsions manufactured using GFS were applied to lipid digestion system and various interfacial properties of emulsions were analyzed with different lipid digestion time. Main components of GFS were monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG), ant their contents were 12.4 mg/kg and 11.2 mg/kg, respectively. Emulsion added with GFS produced significantly less free fatty acids compared with emulsions added with lecithin and tween 80, which resulted in significantly less reduction of interfacial activity in emulsion added with GFS. In case of droplet size of the lipid particles, emulsions except emulsion added with lecithin showed generally similar values. Therefore it is considered that GFS shows the inhibitory effect on lipid digestion by inhibiting the action of the lipase during lipid digestion, and GFS has high potential for utilization as a anti-obesity material.
Heedon Choi, chdon@kfri.re.kr
