Sleeping with lights on raises type-2 diabetes risk by up to 67%, according to a study of 85,000 people tracked for eight years. Light reaching your eyes even through closed lids tricks your brain into thinking it's daytime, disrupting your circadian rhythm and triggering fatigue, weight gain, and insulin resistance over time.
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Here's what happens to you when you fall asleep with a lamp, TV, or any other kind of light on. A massive study tracked 85,000 people who wore light sensors for a week and followed them for almost 8 years, and the results were shocking. People exposed to more light at night had up to a 67% higher risk of developing type 2 diabetes, no matter their age, weight, or their diet. And here's the crazy part: you don't even have to look at the light. Just having it in your room, even a dim lamp or the glow from your TV, send signals to your eyelids that disrupt your circadian rhythm. So your body thinks it's still daytime, and over time, that raises your risk of fatigue, weight gain, and insulin resistance. So turn off all the screens an hour before bed and use blackout curtains or even an eye mask. If you found this helpful, make sure to follow for more daily tips like this you won't hear anywhere else.