Fully agree on diet, but you should look at some of the data presented in the book. There is evidence - particularly the book talks about gut sterile mice and

Fully agree on diet, but you should look at some of the data presented in the book. There is evidence - particularly the book talks about gut sterile mice and some of the studies showcasing weight gain scenarios vs non-sterile biome mice on an exact diet. While it's no silver bullet, dismissing the value of a healthy gut is not productive either. No evidence doesn't mean there isn't something worth pursuing. It's a relatively greenfield area of study at this point in time which is why it's interesting to watch it unfold.