Buijs MM, et al. - In this single-centre randomized controlled trial with blinding of the investigators to the randomization, the researchers ascertained whether coffee or chewing gum can increase excretion of the colon capsule within battery life time (excretion rate). For this analysis, 186 screening participants with a positive immunochemical fecal occult blood test were involved. It was observed that chewing gum and coffee did not improve excretion rate. Findings suggested that an effect of chewing gum could not be proven, possibly due to sample size. Chewing gum might improve excretion rates in this study, is cheap and has no known side effects.