A new Australian study has uncovered a hidden danger of nighttime screen use — a significantly increased risk of heart disease. Researchers have linked prolonged exposure to artificial light from phones, TVs, and bright room lights to a rise in heart attacks, strokes, and irregular heartbeats.
Published by the Flinders Health and Medical Research Institute, the study shows that even after accounting for factors like sleep, diet, and exercise, nighttime lighting alone disrupts the body’s natural rhythm — leading to serious cardiovascular strain.
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“The body isn’t built to function under bright light at night,” researchers said, pointing to imbalances in hormone release, blood pressure, and heart rate caused by screen exposure after dark.
The study also found that women are more vulnerable to these effects, with a higher risk of heart failure, while younger individuals may face an increased risk of arrhythmia.
Experts now urge people to cut screen time before bed and use softer lighting in the evening to protect long-term heart health.
