There’s a link between the blue light emitted from cell phones, melatonin, and weight gain, reports Global News.

“We’re a 24 hour society, so when we’re looking at our phones, we’re going to check our social media accounts, we’re going to check that text and most of the times we’re going to start thinking about a text or an email and it’s going to be really hard to get back into our sleep,” said Amanda Hudye, president of SleepWell Consulting.