What is the 'sleepy girl mocktail' and can it actually help you sleep?

ViewThere’s a trendy beverage on social media that could help improve your sleep. The “sleepy girl mocktail” combines tart cherry juice, magnesium powder and sparkling water. 

If you drink the mocktail — which, by the way, isn’t just for women — about an hour before you go to bed, doctors say it can actually help...