Disrupting the gut microbiome can be a desirable outcome. There is a link between the biome and mental health[0], with experiments even transplanting faeces to introduce "healthier" flora.[1]
Shrinks are sometimes prescribing probiotics for anxiety conditions.
[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5641835/
[1] https://www.psychologytoday.com/au/blog/reading-between-the-...