Changes in Human Plasma Triglyceride Values after Ingestion of Powdered Oil and Liquid Oil

Summary : Powdered oils are oil products in which fine oil particles with an average diameter of 1 μ m are en-capsulated with carbohydrates, proteins, etc., and have been used in food products to fulfill a variety of func-tions, such as conferring cooking properties and flavors, and improving texture. It has been suggested that the particle size of fat globules affects their speed of digestion and absorption, but the digestion and absorption of powdered oils have not been investigated in any detail. In this study, we conducted a crossover trial involving 24 healthy young adult males to compare the postprandial plasma TG and FFA response to two types of fat load: powdered oil and liquid oil. A total of seven blood specimens were collected at one-hour intervals from 0 h to 6 h, and plasma TG and FFA values were measured. Plasma TG values peaked at three hours after consumption of both powdered oil and liquid oil. Between 0 h and 3 h, a significant interaction between time and the type of oil was found, and the area under the curve （ delta AUC ） of plasma TG after consumption of powdered oil was significantly larger than that after consumption of liquid oil. These findings suggest that powdered oil may be absorbed to a greater degree than liquid oil during the early postprandial phase.