"Innocuous" exposure to light at night alters circadian rhythms, which may in turn lead to weight gain, a new review suggests.
Clues that this might be a problem were first found in mice, which, when exposed to even low levels of light at night, "would shift their timing of food intake, and even though they were not eating any more calories, they were still gaining weight," coauthor Laura Fonken, PhD, from Ohio State University, Columbus, told Medscape Medical News.
"We think these results could be important to humans as well, [because] we all use computers late at night. We leave lights on late at night," she continued. "We have streetlights that come in our windows. All these different sources of light may be affecting the circadian system, which has consequences for metabolism."
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