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Blue light at night increases the consumption of sweets in rats

1 min read Diet and nutrition
​A new study demonstrates that just one hour of exposure to blue light at night – the kind of light produced by the screens of our many devices – raises blood sugar levels and increases sugar consumption in male rats.

This study, led by Anayanci Masís-Vargas and colleagues from the University of Strasbourg and University of Amsterdam, was presented this week at the annual conference of the Society for the Study of Ingestive Behavior (SSIB) in Utrecht, Netherlands.

Previous research has shown a strong correlation between obesity and the levels of artificial light at night. Much of the artificial light we are now exposed to comes from LED lights and LED screens, which emit high levels of blue light. Retinal cells of the eye are sensitive to this blue light and directly convey information to areas of the brain that regulate appetite

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