A new Israeli study shows that artificial light at night (ALAN) can cause weight gain and even lead to some types of cancer, ISRAEL21c reported.

The study, which was published in the International Journal of Obesity, demonstrates that artificial light disrupts daily rhythms and suppresses the production of melatonin, a hormone produced by animals and humans at night.

“In recent years there are a lot of studies that use ALAN as a proxy for different health issues including obesity. Some lab studies have examined how ALAN leads to body-mass gain among mice,” explains University of Haifa mathematics and economics PhD student Nataliya Rybnikova to ISRAEL21c.

“Melatonin is responsible for metabolic function, and ALAN also influences metabolic function in people. So we decided to check if there is an association between ALAN and body-mass gain,” she adds.

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