The British psychologist Kimberley Wilson works in the emergent field of whole body mental health, one of the most astonishing frontiers we are on as a species. Discoveries about the gut microbiome, for example, and the gut-brain axis; the fascinating vagus nerve and the power of the neurotransmitters we hear about in piecemeal ways in discussions around mental health. The phrase “mental health” itself makes less and less sense in light of the wild interactivity we can now see between what we’ve falsely compartmentalized as physical, emotional, mental, even spiritual. And so much of what we’re seeing brings us back to intelligence that has always been in the very words we use — “gut instinct,” for instance. It brings us back to something your grandmother was right about, for reasons she would never have imagined: you are what you eat. There is so much actionable knowledge in the tour of the ecosystem of our bodies that Kimberley Wilson takes us on this hour. This is science that invites us to nourish the brains we need, young and old, to live in this world.