Light during sleep may be associated with a higher risk of heart disease

A recent study has revealed a possible link between exposure to light during sleep, even if it's dim, and changes in the structure and function of the heart, along with a higher risk of certain cardiovascular diseases.

According to the results, seemingly harmless lighting in the bedroom is not as simple as it might seem, as researchers believe that constant exposure to light during sleep hours may interfere with the body's normal biological rhythm, which in turn reflects on long-term heart health.

What it means for healthy sleep

Researchers stress that sleeping in a completely dark environment remains one of the simplest habits that can support heart health, along with other well-known factors such as diet, physical activity, and stress management.

The study has not yet identified a precise mechanism that explains how night light affects the structure and function of the heart, but it adds to a growing body of research linking sleep quality and environment to cardiovascular health.

Experts recommend limiting light sources in bedrooms, such as screens and night lights, as a precautionary measure until more studies are available confirming the extent and causes of this association.