Comment by jadamson
Yoghurts probably won't help, but Fecal Microbiota Transplantation might.
A team at the University of Calgary is currently recruiting participants with Major Depressive Disorder and Obsessive-Compulsive Disorder:
https://research.ucalgary.ca/participate/clinical-trial-eval...
https://research.ucalgary.ca/participate/focused-study-fmt-o...
Damn, that's my city and I have been struggling with some other stuff
I don't fall under the umbrella of Major Depressive or OCD but if they were doing trials to help anxiety or something I would probably sign up