Numerous studies have examined the potential link between exposure to nighttime light and diabetes risk. A study published in November 2022 found that exposure to outdoor artificial light at night may increase a person’s risk of developing diabetes. Meanwhile, research published in March 2023 indicated that exposure to any type of light while sleeping can heighten a person’s risk for diabetes, obesity, and high blood pressure in those of older age.
Now, researchers from Flinders University in Australia further confirm a possible correlation between bright light exposure at night and a higher risk of developing type 2 diabetes.
In a study recently published in the journal The Lancet Regional Health – Europe, scientists report that avoiding bright light at night may be a cheap and easy way to possibly delay or prevent the development of type 2 diabetes. For this study, researchers analyzed medical data from almost 85,000 people throughout the U.K. Biobank who did not already have a type 2 diabetes diagnosis. Study participants each wore a light sensor on their dominant wrist for one week that recorded their light exposure both during the day and at night.
We were not surprised to see a link with night light exposure, but we did find the strength of the effect quite remarkable. Even after doing this, the relationship of light exposure with type 2 diabetes remained robust. This study highlights the importance of getting a good night’s sleep in improving sugar control. She reminded readers that delaying the progression of type 2 diabetes is still multifactorial and involves a good diet, exercise, and lifestyle changes.
Reducing night light important for total well-being This study shows us another reason to talk to our patients about light exposure in the evening, especially before bedtime. We know that type 2 diabetes is exploding in this country, and any way we can slow down this progress will benefit the individual as well as society [as a] whole. We are familiar with the devastating side effects on the eye with diabetes and work hard to help our patients maintain their vision.
