Candida species cause thrush and yeast infections. Afaik they are fairly ubiquitous in the human biome but become problematic when Candida gets out of control.

Candida species cause thrush and yeast infections. Afaik they are fairly ubiquitous in the human biome but become problematic when Candida gets out of control. So if you can test for it chemically there could be positives even if it's not a problem. So it would be a matter of looking under a microscope at the gut microbiome and checking if theres an overgrowth. And then treatment is tricky in the gut - how do you target a single problematic species but keep the rest of the microbiome intact? And if you do knock it out, you still need to create the conditions where it doesnt just bloom again since its ubiquitous. In the end it might be a thing where you have to follow general gut health advice and try to cultivate a healthy gut microbiome.