Cheers to a piece of news I found on the web. It's a little old but maybe some of us might still find it useful. Study shows that grapes contain Melatonin. Melatonin is the sleep hormone that tells the body when to go to sleep. Well.. now I can tell my mum not to worry about not being able to sleep during her flight. Just have a bottle of wine! Here's some reading for you!Živjeli!