Artificial light at night does far more than disrupt sleep—it can throw off immune defenses, fuel inflammation, alter metabolism, and affect mood regulation. Studies show that the glow from devices, streetlights, and other nighttime sources confuses the body’s natural rhythms, which evolved to sync with the sun’s light and darkness. From Farm Work to Neuroscience […]



Summary

Artificial light at night disrupts crucial bodily functions beyond sleep. By confusing the body’s natural day-night cycle, it impairs immune responses, increases inflammation, alters metabolism, and destabilizes mood. This disruption stems from our evolved dependence on sunlight and darkness to regulate internal rhythms, a pattern increasingly disrupted by the pervasive glow of devices and nighttime lighting. The long-term consequences, initially observed in farm work, are now confirmed in neuroscience research, highlighting the broad impact of artificial light on health.

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