Park YMM, et al. - Experts explored whether exposure of artificial light at night while sleeping is correlated with the prevalence and risk of obesity in this baseline and prospective analysis involving 43,722 women (aged 35 to 74 years) from the Sister Study. Study participants included women with no history of cancer or cardiovascular disease who were not shift workers, daytime sleepers, or pregnant at baseline. According to findings, nighttime exposure to artificial light while sleeping was associated with increased weight, suggesting that nighttime exposure to artificial light should be addressed in discussions about obesity prevention. Sensitivity analyses and additional multivariable analyses, including potential mediators like sleep duration and quality, diet, and physical activity, supported these results.