A new and concerning study has revealed that constant exposure to artificial light at night can dramatically increase the risk of heart disease in people over the age of 50.
The research, conducted by Australia’s Flinders Health and Medical Research Institute, analyzed 88,905 individuals from the UK Biobank. Participants wore wrist-mounted light sensors for one week, allowing scientists to analyze over 13 million hours of light exposure data and track their heart health outcomes.
The results were alarming. According to the study, individuals who were exposed to light at night showed a significantly higher risk for several cardiovascular events:
- 56% higher risk of Heart Failure
- 47% higher risk of a Heart Attack
- 32% higher risk of Coronary Artery Disease
- 28% higher risk of a Stroke
The study also noted that relatively younger individuals and women showed higher chances of developing conditions like weakened heart muscles and atrial fibrillation.
Experts explain that the primary cause is the disruption of the body’s natural clock (Circadian Rhythm). Night-time light suppresses the production of the hormone melatonin, which is essential for restful sleep and cardiovascular health. These changes can ultimately lead to serious heart conditions.
Researchers emphasized that reducing unnecessary light exposure at night and improving the natural balance of day and night could be an effective way to lower the risk of heart disease. They also suggested that doctors should advise patients, especially night-shift workers, to make lifestyle changes in light of these findings.
