Ruairi Robertson is nutritionist, microbiologist and neuroscientist, as well as an expert about the link between the gut and the brain. In this talk, held at the TEDxFulbrightSantaMonica event with the title ‘Food for thought: How your belly controls your brain’, Robertson explained how our intestines and the microbes within them can influence both physical and mental health—and most importantly, how our diets may be able to influence this relationship.