What compounds do trees release that affect NK cells?

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Trees release phytoncides that enhance Natural Killer cell activity.

Trees release specific compounds known as phytoncides, which have a direct impact on the body's Natural Killer (NK) cells. Research indicates that exposure to these phytoncides can lead to an increase in the number of NK cells and elevate the levels of certain anti-proteins within the body.
Phytoncides boost NK cell quantity and protein levels

Phytoncides are volatile organic compounds emitted by trees. Studies, such as the one establishing "Forest Medicine," have observed that these airborne substances increase the count of NK cells, which are crucial for identifying and eliminating cancerous cells. Furthermore, the presence of phytoncides has been linked to higher concentrations of anti-proteins like perforin, GRN, and GrA/B, which are integral to the cytotoxic function of NK cells.
Forest bathing enhances immune response

The practice of forest bathing, or Shinrin-yoku, involves spending time in natural forest environments. This exposure to phytoncides is understood to strengthen the immune system. While not a replacement for conventional medical treatments like chemotherapy, forest bathing is suggested to bolster the body's defenses, potentially aiding in cancer prevention.
Sustained NK cell activity observed post-exposure

A notable finding regarding the effects of phytoncides is the duration of their impact on NK cells. The enhanced activity observed in NK cells can persist for up to 30 days following a single forest bathing session. This prolonged effect suggests that engaging with forest environments can provide lasting benefits to the immune system.

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What compounds do trees release that affect NK cells?

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