{Reference Type}: Journal Article {Title}: The role of bacterial metabolism in human gut colonization. {Author}: Muñoz-Cazalla A;de Quinto I;Álvaro-Llorente L;Rodríguez-Beltrán J;Herencias C; {Journal}: Int Microbiol {Volume}: 0 {Issue}: 0 {Year}: 2024 Jun 28 {Factor}: 3.097 {DOI}: 10.1007/s10123-024-00550-6 {Abstract}: Can we anticipate the emergence of the next pandemic antibiotic-resistant bacterial clone? Addressing such an ambitious question relies on our ability to comprehensively understand the ecological and epidemiological factors fostering the evolution of high-risk clones. Among these factors, the ability to persistently colonize and thrive in the human gut is crucial for most high-risk clones. Nonetheless, the causes and mechanisms facilitating successful gut colonization remain obscure. Here, we review recent evidence that suggests that bacterial metabolism plays a pivotal role in determining the ability of high-risk clones to colonize the human gut. Subsequently, we outline novel approaches that enable the exploration of microbial metabolism at an unprecedented scale and level of detail. A thorough understanding of the constraints and opportunities of bacterial metabolism in gut colonization will foster our ability to predict the emergence of high-risk clones and take appropriate containment strategies.