The modern world is a 24/7 sensory overload. This could be especially bothersome at night, when we need the utmost darkness to fall asleep and stay in the deepest sleep. Unfortunately, light pollution, spurred by tons of artificial brightness both outside and inside our homes, might be doing more than keeping us up at night. It could be damaging our hearts.

A new analysis from Massachusetts General Hospital, set to be presented at the American Heart Association’s Scientific Sessions 2025, has found that exposure to artificial light at night is closely linked to increased brain stress signals, inflamed blood vessels, and a greater risk of heart disease.

Researchers reviewed the data of 466 adults who underwent brain and heart imaging at the hospital between 2005 and 2008, cross-referencin

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