green light exposure activates the brain's natural pain-dampening pathways via endogenous opioids
Green LED light exposure activates descending pain inhibitory pathways involving the brainstem and spinal cord, leading to increased levels of endogenous opioids such as enkephalins, producing analgesic effects that are blocked by naloxone.
What this means for you
Your brain has its own built-in pain relief system — and green light appears to switch it on. Studies show it triggers the release of natural opioid-like compounds (enkephalins) through pathways running from the brainstem down the spinal cord. For everyday people, that points toward a non-invasive way to support comfort and ease physical tension.
The published research
Effects of Different Visual Color Stimuli on Stress Responses in Patients with Dental Phobia
Journal of Clinical Medicine · 2025
This page describes a documented finding about the underlying wellness technology. It is not a marketing claim about any specific device. For information about HOCATT specifically, visit hocatt.com.