So, a bit of background on fecal transplants. The idea is that you take the gut bacteria from a healthy donor, and put it in an unhealthy person's gut. This will make the recipient's metabolism/digestion more like the donor's. This has been found to work for weight loss; you give a normal-weight donor's microbiome to an overweight person, and they lose weight a significant fraction of the time.

So, when I read:

> the woman received a fecal transplant from her overweight but healthy daughter, via colonoscopy

I cringed. There are three things wrong with that. First: you don't need to use a relative, because fecal transplants don't have risk of rejection. Second, you wouldn't use a donor who's overweight. And third, it's normally done with a swallowed capsule, not with a colonoscopy, which adds risk and unpleasantness for no reason.

(Edit: The primary source says "With the occurrence of weight gain after FMT in this case, it is now our policy to use nonobese donors for FMT. The untoward consequences of using nonideal FMT donors are important, because patients may prefer to use a family member rather than an unrelated or unknown stool donor due to the perception that these sources are safer.")