A new study suggests that blue-enriched light exposure immediately before and during the evening meal may increase hunger and alter metabolism.
Results show that blue-enriched light exposure, compared with dim light exposure, was associated with an increase in hunger that began 15 minutes after light onset and was still present almost two hours after the meal. Blue light exposure also decreased sleepiness and resulted in higher measures of insulin resistance.
"It was very interesting to observe that a single three-hour exposure to blue-enriched light in the evening acutely impacted hunger and glucose metabolism," said study co-author Ivy Cheung, a doctoral candidate in the Interdepartmental Neuroscience program at Northwestern University in Chicago, Illinois. "These results are important because they suggest that manipulating environmental light exposure for humans may represent a novel approach of influencing food intake patterns and metabolism."
The research abstract was published recently in an online supplement of the journal Sleep and will be presented Tuesday, June 3, in Minneapolis, Minnesota, at SLEEP 2014, the 28th annual meeting of the Associated Professional Sleep Societies LLC.
The study group comprised 10 healthy adults with regular sleep and eating schedules who received identical carbohydrate-rich isocaloric meals. They completed a four-day protocol under dim light conditions, which involved exposure to less than 20 lux during 16 hours awake and less than 3 lux during eight hours of sleep. On day three they were exposed to three hours of 260 lux, blue-enriched light starting 10.5 hours after waking up, and the effects were compared with dim light exposure on day two.
Cheung noted that more research is needed to determine the mechanisms of action involved in the relationship between light exposure, hunger and metabolism.
Explore further: Study links workplace daylight exposure to sleep, activity and quality of life
More information: "Evening Blue-Enriched Light Exposure Increases Hunger and Alters Metabolism in Normal Weight Adults," Sleep, 2014.
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A new study suggests that blue-enriched light exposure immediately before and during the evening meal may increase hunger and alter metabolism.
Results show that blue-enriched light exposure, compared with dim light exposure, was associated with an increase in hunger that began 15 minutes after light onset and was still present almost two hours after the meal. Blue light exposure also decreased sleepiness and resulted in higher measures of insulin resistance.
"It was very interesting to observe that a single three-hour exposure to blue-enriched light in the evening acutely impacted hunger and glucose metabolism," said study co-author Ivy Cheung, a doctoral candidate in the Interdepartmental Neuroscience program at Northwestern University in Chicago, Illinois. "These results are important because they suggest that manipulating environmental light exposure for humans may represent a novel approach of influencing food intake patterns and metabolism."
The research abstract was published recently in an online supplement of the journal Sleep and will be presented Tuesday, June 3, in Minneapolis, Minnesota, at SLEEP 2014, the 28th annual meeting of the Associated Professional Sleep Societies LLC.
The study group comprised 10 healthy adults with regular sleep and eating schedules who received identical carbohydrate-rich isocaloric meals. They completed a four-day protocol under dim light conditions, which involved exposure to less than 20 lux during 16 hours awake and less than 3 lux during eight hours of sleep. On day three they were exposed to three hours of 260 lux, blue-enriched light starting 10.5 hours after waking up, and the effects were compared with dim light exposure on day two.
Cheung noted that more research is needed to determine the mechanisms of action involved in the relationship between light exposure, hunger and metabolism.
Explore further: Study links workplace daylight exposure to sleep, activity and quality of life
More information: "Evening Blue-Enriched Light Exposure Increases Hunger and Alters Metabolism in Normal Weight Adults," Sleep, 2014.
Medical Xpress on facebook
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Oct 25, 2012
Adolescents can be chronically sleep deprived because of their inability to fall asleep early in combination with fixed wakeup times on school days. According to the Centers for Disease Control (CDC), almost ...
Sleep apnea plus dim light at night increases depression, anxiety in mice
Jul 16, 2013
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Poor sleep equal to binge drinking, marijuana use in predicting academic problems
1 hour ago
A new study shows that college students who are poor sleepers are much more likely to earn worse grades and withdraw from a course than healthy sleeping peers.
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