A team of researchers that includes the University of Toronto’s Caitlin Maikawa has developed a swallowable, low-cost device that allows people with inflammatory bowel diseases (IBD) to easily monitor their health at home. The PRIM (Pill for ROS-responsive Inflammation Monitoring) device is designed to release a harmless blue dye in the presence of gut inflammation, changing the colour of stools and toilet water – an easy, at-home alternative to colonoscopies and lab-analyzed stool samples.