ABSTRACT
We prepared a 1,3-DAG-rich oil by esterifying glycerol with fatty acids from natural vegetable oils by the method of Huge-Jensen et al. (1) using a reverse reaction of immobilized lipase. The combustion heat of cooking oil containing 87% DAG was 2% less than that of TAG (Table 2) (2), which is likely negligible in terms of practical intake. Furthermore, the absorption coefficients of the DAG and TAG oils determined in rats were similar (Table 3) (2). These results suggest that the physiologic differences between DAG and TAG observed in humans and animals described below are caused by their different metabolic fates after absorption into the gastrointestinal epithelial cells.
