I would love to know how to avoid ‘travellers tummy’ although all the usual rules are followed –

• No ice in drinks
• Don’t drink the local water
• Use  bottled water for teeth cleaning and washing fruit
• Avoid street food
• Wash hands before eating
• Use anti bacterial hand gel
• Wash hands after using the bathroom

etc etc etc

…..it still seems to strike at times, maybe I am allergic to something? have tried a pastile that is consumed before and during the holiday and have now read about pepto bismol and would appreciate other travellers tales about this…. should it be used before travelling? All suggestions advice greatly received!