Soil teeming with specific microorganisms, particularly Mycobacterium vaccae, has been linked to positive effects on mood and emotional regulation. Exposure to this type of soil, whether through gardening, inhalation, or other means, may stimulate the release of cytokines in the brain, leading to increased serotonin production. A classic example involves improved learning capabilities in mice exposed to M. vaccae.
The potential benefits of exposure to these beneficial microbes include stress reduction, improved cognitive function, and potentially a decreased risk of developing certain mood disorders. This emerging field of research builds upon the historical understanding of the human-nature connection and explores the complex interplay between environment, microbes, and mental well-being. Early studies exploring this connection focused primarily on animal models, demonstrating promising results that warrant further investigation in humans.
