A bacteria that can create calories out of thin air sounds like it’d be useful, if true.
The belief in bacteria causing obesity is so prevalent in the medical world, that you can’t donate fecal matter for a fecal transplant if you’re above a certain body fat percentage, because it’s believed bacteria obese people carry that caused them to become obese will make a thin person obese if the bacteria is transplanted to the thin person from the obese person.
im someone who seems to not put on weight super easy and my wife is the opposite. 100% she seems to digest food more thoroughly than I. A lot of veg, especially like corn but I have had tomatoe, shows up in my stool. never in hers.