A study found that there was a significant correlation between weight gain and sleeping with a light source on. This may be due to the light preventing us from getting quality sleep but exactly how it affects our weight is yet to be determined.
Short sleep has been associated with obesity, but to date the association between exposure to artificial light at night (ALAN) while sleeping and obesity is unknown. -JAMA
-via Variety
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In women 35-74 with no control other than self reporting BMI. Don't get me wrong turning off the light will get you better sleep but the study needs more controls to be definitive.
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I need weight! I don't need to turn off the light. Thanks for the tip!
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