This study investigated the relationships between altered intestinal microbiota and impaired sleep function in mice. Five mice were given antibiotics to perturb their gut microbiota, five were fed a high-fat diet, and five served as controls on a low-fat diet. Both antibiotics and high-fat diet caused increased intestinal permeability. Antibiotic-treated mice also had reduced spleen size and white blood cell count, resembling germ-free phenotypes. Additionally, antibiotics decreased the ability to harvest energy from food. Preliminary results suggest that different alterations to gut microbiota composition similarly impair the mucosal barrier and may disrupt the glymphatic system and sleep. Detailed analysis of fecal microbiota and recorded sleep behavior will provide insight into how microbi