I have to criticize this study for not being broader. It only studies what happens to people eating an extreme diet. I eat a low carb, moderate protein, high fat diet (keto, basically). What happens on that diet? As far as I can tell, my gut is happy with it. The carbs I do eat are mostly from salad and other veggies like broccoli and green beans, so does this keep the gut microbes happy while allowing me to eat meat without the repercussions mentioned in the article? This seems like tabloid science: it goes for a flashy result but not much in the way of practicality.