As a jet lag remedy and sleep aid, melatonin has been widely studied, and it's now a commonly accepted part of effective jet lag remedy. The latest research seems to show that melatonin aids sleep during times when you wouldn't normally be resting, making it of particular benefit for people with jet lag.

Tart cherry is a natural source of melatonin, which means if you're trying to reset your body clock to an earlier time, such as after flying east, you should have CherryWorks packed in your carry-on. The time at which you take natural melatonin is important. If you are flying east, take melatonin in the evening. If you're trying to reset your body clock to a later time, such as after flying west, melatonin should be taken in the morning.