# Shinrin-Yoku
A Japanese therapeutic practice of spending time in a forest to improve health.
## Biological Mechanism
Trees emit **Phytoncides** (antimicrobial wood essential oils) which, when inhaled, increase the activity of Natural Killer (NK) cells in humans, boosting the immune system.
The physiological and psychological practice of immersing oneself in a forest environment.
Researcher Note:
Link to Biophilic Design (Vol III).
Link to Biophilic Design (Vol III).