Too much light at night may quietly reshape your heart https://www.sciencedaily.com/releases/2026/09/260911003847.htm Nighttime light exposure and cardiac structure and function https://academic.oup.com/eurheartj/advance-article/doi/10.1093/eurheartj/ehag563/8770409 Nighttime light exposure was linked to thicker, stiffer heart chambers and early signs of reduced heart function