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Research links obesity to artificial light exposure at night

Researchers who followed almost 44,000 women, ages 35 to 74, for nearly six years found that those who slept with a light or a television on in the bedroom had a 22% increased risk of becoming overweight and 33% higher odds of developing obesity, compared with women who slept in total darkness. Published in JAMA Internal Medicine, the findings revealed that artificial light exposure at night while sleeping was tied to weight gain both in women with sufficient and insufficient sleep, said lead study author Dr. Yong-Moon Park.

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