Burgess, Drew

Previous research implicates the gut-brain axis in mental health, but factors such as cultural diet and other circumstances that influence the gut-brain axis have not been extensively studied. This thesis aims to investigate cultural factors and other factors, including seasonal and economic conditions, that may influence diet and therefore, the gut microbiota, and in turn, the gut-brain axis. To explore this connection, the relationship between components of diet and changes in the gut microbiota composition was reviewed. To understand how those factors may interact to impact anxiety and depression via the gut-brain axis, a host of influences should be considered, including diet as one of many complexities that contribute to an individual’s mental health. This thesis proposes recommendations for mental health professionals, public health policy, and future research to effectively support the mental health of individuals with conditions, such as anxiety and depression, with the respect and mindfulness they deserve.