Two days later, I was asking myself what the heck had changed. My mood seemed much more stable, even, comfortable.
The only thing that had changed, was the vitamin D.
Now, if/when I run out of it and don't get to the store for a few days, I notice my mood regressing. Particularly when I haven't recently gotten significant, direct skin sun exposure.
As for magnesium, more recently I read that, among other things, it helps with vitamin D absorption and/or utilization. This is not its only apparent benefit. And, unlike some other supplements, there appears to be direct observation of subjects/people to back up claims of these other benefits. I don't know about studies that elucidate the relative biochemical mechanisms.
As far as my other issues, and in the past when I ate food, celiac tends to result in malabsorption of many nutrients, which probably contributes to symptoms.
https://ubiome.com/ http://humanfoodproject.com/americangut/
UBiome is a Silicon-valley startup.
American Gut Project is a university research project out of Boulder, CO.
I cannot even say the quoted study is appropriate for evaluating the matter. Reproduction please.
I'm also waiting for a long term followup.
Now that I have stopped consuming gluten, the trigger for celiac, my moods are much more stable. When I inadvertently consume some, part of the reaction I have (which is days long) includes psychological symptoms. Now, in the absence of frequent gluten poisoning, these symptoms stand out.
However, with all this experience, I have no idea how my microbiome affects my mental health. The effects could easily be explained by the immune storm kicked off in my body by gluten. I also have little idea of how my health observations relate to normal people who don't have celiac. Probiotics don't seem to affect my sense of well-being.
There is a startup in Los Alamos focused on personal microbiomes. I'm thinking of getting analyzed: https://www.viome.com