green light exposure (530–547 nm) measurably lowers stress-linked enzyme activity before high-anxiety events
Green goggle exposure (530–547 nm) significantly reduced salivary alpha-amylase activity (a biomarker of sympathetic/SAM axis activity) compared to translucent control (p = 0.009) in dental phobia patients prior to a stressful procedure.
What this means for you
Salivary alpha-amylase is a reliable marker of your nervous system's stress response — when it drops, it signals your body is shifting away from high-alert mode. Green light in this wavelength range appears to support that calming shift, which could matter before anything that normally spikes your anxiety.
The published research
Effects of Different Visual Color Stimuli on Stress Responses in Patients with Dental Phobia
Journal of Clinical Medicine · 2025
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