This article explains why getting dirty in the garden can be even more beneficial for mental health than previously thought. Antidepressant microbes in soil may increase production of serotonin, a stress reducing hormone in humans. The Mycobacterium vaccae bacterium was tested both by injection and ingestion on rats, and the results were increased cognitive ability, lower stress and better concentration on tasks than a control group. Includes links to original research.
Author: Grant, B. (2007). Soil Microbes And Human Health – Learn About The Natural Antidepressant In Soil. [online] Gardening Know How. Available at: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/antidepressant-microbes-soil.htm [