Interesting, I had a bout of depression that I believe started when I did a monthlong low carb low calorie diet (with doctors and nutritionist). Gut health is a huge factor.
Maintaining that diet for an extended duration, however, is always the challenge when others in the household do not follow it. Logically, I should stop being a baby and just power on with it. Or at least determine what in my "normal" western diet negatively impacts gut health/skin health and overall energy.