A few years ago, we embarked upon one of largest metabolomic profiling projects ever undertaken on gastroenterology patients. Colleagues collected and analysed blood, breath, faeces and urine from patients with a range of digestive disorders. We applied some particularly rigorous data analysis methods to the acquired data and the results have finally been published in Metabolomics. One finding stands out – Crohn’s disease appears to have a distinctive faecal metabolome. Find more details in the paper.