The Serious Reason You Need to Sleep in the Dark

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Previous research has linked poor sleep to a higher risk of depression, breast cancer, and prostate cancer. Now we can add metabolic diseases such as diabetes to the list: “Sleep disturbances affect more than 25 percent of the general population and up to 50 percent of older adults… Improving sleep in adults at risk for heart disease, stroke, and diabetes represents a much needed and novel approach to the prevention and treatment of epidemics of type 2 diabetes and obesity, as well as improve the quality of life of those suffering from sleep disturbances.”

Although this is preliminary research, it does support the idea that you should avoid falling asleep on the couch and spending part—or most—of the night with the lights on and the TV blaring.

Here are the bedtime habits can interfere with a sound night’s sleep.

Quote the study authors if possible (OK to pull from Science Daily as long as you cite the source) about how light boosts insulin resistance and what exactly constitutes sleeping with light (like, nighlight too much? how about a little light under the door from a hallway? do you need black-out curtains)?

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