Yangwenshan Ou, a PhD candidate in our lab group and Microbiology group at Wageningen University and Research, has been focused on the association of behavioral problems with the gut microbial composition in children. Multiple psychiatric disorders, such as major depressive disorder, bipolar disorder, and autism spectrum disorder, have been observed with perturbations in the gut microbial community and functions. However, only very limited evidence can be reached from mentally healthy individuals. Therefore, she started her studies on mentally healthy children with different levels of problem behavior, based on two longitudinal cohorts called the BIBO (Basal Influences on the Baby’s Development) and the BINGO. Recently, she wrote a blog for the New Brain Nutrition project. Click here to find more clues for the relations between behavior and the gut microorganisms.