Tiny balls of nano-sized cellulose fibres added to food reduced fat absorption by up to half in laboratory and animal experiments, report scientists from Nanyang Technological University, Singapore (NTU Singapore) and Harvard University, United States. This discovery could aid in the global battle against obesity, as experiments done in a simulated gastrointestinal tract showed that nanocellulose fibres 100 times smaller than the width of a human hair could cut fat absorption by up to 48 percent.