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BLUE LIGHT CAUSES SUGAR CRAVINGS AND WEIGHT GAIN

Researchers Find Correlation Between Blue Light, Sugar Cravings, and Weight Gain.

A new study presented by researchers from the University of Strasbourg and University of Amsterdam at the Society for the Study of Ingestive Behavior, annual conference revealed that just one of hour of blue light exposure from digital screens raises blood sugar levels and increases sugar consumption in male rats.

In the study, rats were exposed to blue light at night and their food consumption was measured as well as their glucose tolerance the following day. Researchers found that after only 1 hour of blue light exposure, the rat’s glucose tolerance changed significantly. They also gave the rat’s different food options and the results showed that they favored sugary water over any other food choice. Researchers hope to conduct these studies on humans in the future.

Limiting the amount of time that we spend in front of screens at night is, for now, the best measure to protect ourselves from the harmful effects of blue light study co-author Anayanci Masis-Vargas

Previous research conducted by researchers at the National Institute of Environmental Health Sciences in North Carolina also show a correlation between exposure to blue light at night and weight gain. They studied over 43,000 women and found that exposure to artificial light at night while sleeping contributed to increased risk of weight gain and obesity, especially when a light or a TV was left on in the room while sleeping.

Full details of both research studies can be found here:
https://www.nature.com/articles/s41514-019-0038-6

https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2735446
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