Magnesium for Depression, by Emily Deans M.D.
A controlled study of Magnesium shows clinically significant improvements, Jan. 2018

Magnesium is one of the most important minerals in the body. Years ago, I wrote about the importance of magnesium for the brain; it remains my most read blog post to this day.

We get most of our magnesium from plants (almonds, black beans, cashews, pumpkin seeds, and dark chocolate are all good sources), but it's the bacteria in the soils that enable plants to absorb magnesium, so all sorts of environmental influences can deplete magnesium in our food, from pesticides that ...https://www.psychologytoday.com/blog/evolutionary-psychiatry/201801/magnesium-depression