Nurturing the human microbiome has long been linked with improved health https://www.theguardian.com/environment/2025/nov/06/how-were-killing-our-internal-ecosystem-and-what-we-can-do-to-reverse-it Just one month of growing plants boosted skin bacteria and the body’s immune response. It was not the act of gardening that was important, but contact with healthy, biodiverse soils