An article in Neuroscience News and Networks suggests that 20 minutes in nature every day significantly lowers stress hormones. A study they cited that was published in Frontiers in Psychology and conducted by researchers at the University of Michigan found that 20 to 30 minutes of sitting or walking in nature lowered cortisol levels significantly. Further time in nature continued to help, but the rate of cortisol reduction was lower.  Associate Professor MaryCarol Hunter called the time spent in nature “Nature Pills” and said healthcare practitioners could prescribe nature pills to help individuals alleviate stress.

For more information, see the article in Neuroscience News and Research: https://www.technologynetworks.com/neuroscience/news/twenty-minutes-in-nature-is-enough-to-cut-stress-hormone-levels-317872