Journeys, especially long ones that involve a change of time zone, involve sudden changes of habits and can therefore generate stressful situations that cause intestinal problems. Our body, in fact, has to adapt quickly to new habits, often very different from those of our everyday lives. Travellers who prefer exotic destinations, so to very hot places, often with poor levels of hygiene, are frequently affected by imbalances of the intestinal bacterial flora, which can bring constipation, sickness or diarrhoea.

One of the most common travel ailments is so-called "traveller's diarrhoea" caused by poor food and hygiene conditions. To keep the intestine healthy during travel, it is important to follow the right precautions, such as not eating raw foods, drinking only bottled water and avoiding ice cubes, eating fruit and vegetables that have been peeled or washed with bicarbonate, paying attention to personal hygiene, keeping up some physical exercise and regularly taking dietary supplements of live lactic acid bacteria.