Eating well while on the road can usually be a challenge - you don't have a kitchen on hand to prepare nutritious meals, you're in a different timezone that's turned your whole system upside down, let alone your digestive tract, you've usually been flying for some time, so dehydrated skin and water retention or bloating (blechhh!) can happen. Basically - it's not pretty.  And add to that you're on foreign ground, so navigating your way to good food can be tricky especially if you're in some place off the beaten track...