Abstract
Various studies are continuing in the coffee industry on effective utilization of coffee spent grounds discharged in large quantities. Inspired by mannan contained in coffee spent grounds, we succeeded in industrialized extraction and purification of mannooligosaccharides produced by thermal hydrolysis treatment. Mannooligosaccharides extracted from coffee spent grounds are a highly stable ingredients that have no flavor and color and do not degrade even in harsh environments. While these mannooligosaccharides contribute to intestinal health and body fat reduction, present research is proceeding to investigate new functionalities. In the future, mannooligosaccharides are expected to be applied to various foods with multifunctional properties.