How exactly did your diet change – what did you eat? I started eating more snack food, so I'd have mid-morning snacks. And I went back to eating the kind of cereal I loved as a child, so I would eat my chocolate-covered breakfast cereal. I drank more soda. And I made little swaps, for example, instead of eating nuts as a snack I'd eat chips. And then in the evening I had a lot more convenience food, so I was still eating a few vegetables, but I'd have microwavable lasagna or I'd have takeaway fried chicken or pizza. Overall, about 80% of my calories came from ultra-processed foods and that's very easy to do. Most bread in the supermarket is ultra-processed, almost all of our breakfast cereals and snack foods are ultra-processed and most of our convenience foods are ultra-processed too. I became very unwell very quickly. I felt terrible. I stopped sleeping, I developed anxiety, and became very unhappy. I was the pilot patient in a study I'm running with colle