Whether you're a businessman who has racked up thousands of miles on a frequent flyer programme. Or you've simply been bitten by the holiday travel bug. Any long-haul expedition comes with an unpleasant scoop of jet lag. We used to put it down to the fact that it was just a change in our "states of mind". But studies now show that jet lag is a medical sleeping disorder. That comes as a result of an imbalance in our body's natural biological clock. Aka our circadian rhythms. The mention of a sleeping disorder is often cause for alarm. But for…
