Description:In honeybees, division of labour is a key feature, with age-related behavioural transitions being closely associated with molecular changes in the brain, gut, and microbiota. In this study, to investigate these molecular changes and thus better understand their contribution to behavioural responses and modulation, we analysed the global metabolomic shifts in honeybee workers and their microbiota throughout their lives. Overall, our findings provide new insights toward developing potential biomarkers for evaluation of different functional changes related to various environmental stressors.