This podcast episode highlights the significant role of the microbiome in shaping not only our physical health but also our mental well-being, revealing that our bodies host a complex community of microbes that deeply influence our mood, behavior, and potentially even neurological disorders. Through compelling examples and research, Kathleen McAuliffe paints a picture of humans as a fusion of human and microbial life, urging a reconsideration of our understanding of identity and the factors that influence our health.