During long plane flights I always ask for a glass of wine with dinner. Wine helps me to catnap and relieve the boredom of night travel. But why does red wine cause drowsiness? In the past, we understood that melatonin, a soporific, was only produced by mammals. Now, a report in the Journal of the Science of Food and Agriculture claims that melatonin is also produced by plants. Italian scientists report that the skin of grapes used to make red wine contains high levels of melatonin. So enjoy your merlot or cabernet sauvignon for relaxation and sleep.
