Night-time exposure to bright light has been found to increase the risk of developing type 2 diabetes in a recent study conducted by researchers at Flinders University in Australia. The study involved 85,000 healthy adults without diabetes and found that exposure to light between 12:30 a.m. and 6 a.m. was linked to a 67% increased risk of developing diabetes. The researchers suggest that reducing light exposure at night and maintaining a dark environment may be a simple and cost-effective way to prevent or delay the development of diabetes. The study also found that genetic risk and night light exposure were independent risk factors for developing type 2 diabetes.
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