Nighttime Exposure to Light May Raise Cardiovascular Risk by up to 50% — Harvard Gazette

Nighttime exposure to light may raise cardiovascular risk by up to 50% — Harvard Gazette

Health Nighttime exposure to light may raise cardiovascular risk by up to 50% Alvin Powell Harvard Staff Writer December 1, 2025 5 min read New research suggests that it disrupts biological clock Exposure to light at night raises cardiovascular disease risk by up to 50 percent over sleeping in the dark, new research shows. But scientists say the effect isn’t from lack of sleep, but from disruption …

Exposure to bright light at night increases heart disease risk