# Travel Health Evidence > Jet lag, travellers' diarrhoea, food safety and eating with an allergy abroad. Travel Health Evidence covers the travel-medicine literature that actually affects a trip: jet lag management, gastrointestinal illness prevention, food safety, and managing a restricted diet in a language you do not read. ## About this source - **Publisher:** Stéphane Sprauer - **Editorial stance:** Independent. We describe what the evidence shows, including when it is weak or contested. - **Evidence base:** 61 peer-reviewed citations, each linked to its PubMed record or DOI. - **Languages:** 42 European languages. Add a language prefix to any URL, e.g. `https://travelhealthevidence.org/de/`. - **Licence:** Content may be quoted with attribution to Travel Health Evidence (https://travelhealthevidence.org). - **Not medical advice:** Educational content only. ## How to cite this site > Travel Health Evidence. "". https://travelhealthevidence.org. Accessed . ## Home - [Travel Health Evidence](https://travelhealthevidence.org/): Jet lag management, travellers' diarrhoea prevention, food safety and eating with an allergy or coeliac disease abroad. ## Jet lag - [Managing jet lag](https://travelhealthevidence.org/jet-lag/): Circadian misalignment after travel — light timing, melatonin, and what the systematic reviews support. ## Stomach - [Travellers' diarrhoea: what prevents it](https://travelhealthevidence.org/stomach/): Meta-analyses of probiotic and rifaximin prophylaxis for travellers' diarrhoea, and what food safety measures achieve. ## Restricted diets - [Eating abroad with coeliac disease or a food allergy](https://travelhealthevidence.org/eating-with-a-restriction/): Managing a medically necessary restricted diet in a country whose language and labelling you do not read. ## Risks - [Travel health risks](https://travelhealthevidence.org/risk/): What the evidence supports for 6 common travel health risks, from traveller's diarrhoea to altitude. - [Traveller's diarrhoea: what actually works](https://travelhealthevidence.org/risk/travellers-diarrhoea/): The commonest illness affecting travellers, usually bacterial and usually self-limiting. What the evidence supports, and what it does not. - [Food and water precautions: what actually works](https://travelhealthevidence.org/risk/food-and-water-safety/): The "boil it, cook it, peel it, or forget it" heuristic and what it is actually worth. What the evidence supports, and what it does not. - [Managing allergy and coeliac disease abroad: what actually works](https://travelhealthevidence.org/risk/allergy-and-coeliac-abroad/): Communicating a dietary restriction reliably in another language and food culture. What the evidence supports, and what it does not. - [Jet lag: what actually works](https://travelhealthevidence.org/risk/jet-lag/): Circadian misalignment after crossing time zones, worse travelling east. What the evidence supports, and what it does not. - [Altitude illness: what actually works](https://travelhealthevidence.org/risk/altitude/): Acute mountain sickness and its severe forms, above roughly 2,500 m. What the evidence supports, and what it does not. - [Motion sickness: what actually works](https://travelhealthevidence.org/risk/motion-sickness-travel/): Sensory conflict between vestibular and visual input. What the evidence supports, and what it does not. ## About - [About Travel Health Evidence](https://travelhealthevidence.org/about/): Who publishes Travel Health Evidence, how pages are researched, and how the site makes money. - [Editorial policy](https://travelhealthevidence.org/editorial-policy/): How Travel Health Evidence selects evidence, scores products and handles conflicts of interest. - [Affiliate and partnership disclosure](https://travelhealthevidence.org/disclosure/): Every commercial relationship that could affect what you read on Travel Health Evidence. - [Privacy](https://travelhealthevidence.org/privacy/): What Travel Health Evidence collects — which is close to nothing. ## Research - [New research](https://travelhealthevidence.org/research/): Newly indexed peer-reviewed research relevant to Travel Health Evidence, updated weekly from PubMed and Crossref. - [Research digest, 8 August 2026](https://travelhealthevidence.org/research/2026-08-08/): No newly indexed research matched this site's topics in the week of 8 August 2026. ## Related sites in this network - 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