Researchers from Harvard University have discovered that the brain has a "feeding clock" which can keep track of meal times rather than daylight hours. When you're feeling hungry this clock thinks that food is scarce so it keeps tiredness at bay until you have found some. This means that staving off jet lag is as easy as skipping breakfast. "A period of fasting with no food at all for about 16 hours is enough to reset your clock," says lead researcher Dr Clifford Saper. "Avoiding any food on the plane is the best way to do this." Plus you'll eliminate the stress of not being able to work out exactly which 'seasonal' vegetable it is you're eating.
Source : Men’s Health Mag. Sep. 2009