Food Safety Abroad for Older Travellers: How to Stay Well While Eating Out

Why Food Safety Matters More for Older Travellers

Traveller's diarrhoea and other food and waterborne illnesses affect somewhere between 20 and 60 per cent of international travellers depending on the destination, according to research from travel medicine specialists. For most healthy adults, these illnesses are unpleasant but short-lived. For older adults, the picture can be more complicated.

As we age, the immune system becomes less efficient at identifying and neutralising pathogens such as bacteria and viruses. This means that the same contaminated meal that might cause a younger person a day of discomfort could result in a more severe and prolonged illness in an older traveller. Dehydration, which is one of the main dangers of gastrointestinal illness, is also a more significant risk for older adults, as the body's ability to conserve water and to signal thirst through sensation declines with age.

Additionally, some medications commonly taken by older adults affect immune function, alter gut flora, or interact with treatments used for travel illness. Anyone taking immunosuppressant drugs, proton pump inhibitors, or certain cardiac medications should speak with their doctor before travelling to understand their specific food safety risks and any precautions particular to their situation.

Understanding the Main Risks

The organisms that cause traveller's diarrhoea and food poisoning vary by region. The most common culprit globally is Escherichia coli (E. coli), a bacterium found in contaminated water and food that has come into contact with faecal matter. Other common causes include Campylobacter, Salmonella, Shigella, and Norovirus. In some regions, typhoid fever, hepatitis A, and cholera also present food and water safety risks.

Contamination typically enters the food chain through unsafe water used in cooking, washing produce, or making ice. It can also occur through poor hygiene among food handlers, inadequate refrigeration of perishable foods, or cross-contamination between raw and cooked ingredients in kitchen preparation.

Not all destinations carry the same level of risk. Travel medicine specialists broadly categorise destinations by risk level for traveller's diarrhoea. High-risk destinations include much of sub-Saharan Africa, South and Southeast Asia, Central America, and parts of South America and the Middle East. Medium-risk destinations include Eastern Europe, South Africa, and parts of the Caribbean. Low-risk destinations include Western Europe, North America, Australia, and New Zealand. This does not mean that illness is impossible in low-risk regions, but the general hygiene and food safety standards are substantially higher.

The Fundamentals: Boil It, Cook It, Peel It, or Leave It

A longstanding rule of thumb in travel medicine is to apply the following criteria to everything you eat and drink in higher-risk destinations: if you cannot boil it, cook it thoroughly, or peel it yourself, consider whether it is safe to eat.

Raw fruits and vegetables that can be peeled are generally safe, provided you wash your hands before handling them and peel them yourself rather than relying on someone else to have done so safely. Bananas, oranges, mangoes, and similar fruits with intact skins are good choices.

Raw salads, sliced fruit prepared by others, and raw vegetables washed in tap water carry significantly higher risk in areas where water quality is uncertain. However tempting a fresh salad may appear in a hot climate, it is worth considering whether the produce was washed in safe water.

Thoroughly cooked food served hot is generally the safest option. The internal cooking temperature achieved in properly cooked meat and fish kills most pathogens. Food that has been cooked but left standing at room temperature for an extended period, such as dishes on a buffet, can be recontaminated or allow bacteria to multiply. If hot food does not appear to be actually hot, or has been sitting out for a prolonged period, it is worth applying caution.

Water Safety

In destinations where water quality cannot be guaranteed, tap water and ice made from tap water should be avoided. This includes water used for brushing teeth. Using bottled water for tooth brushing is advisable in high-risk areas, particularly for older adults.

Carbonated bottled water is generally considered safer than still, partly because the carbonation process creates conditions less favourable to bacteria, but primarily because sealed carbonated bottles are harder to tamper with. Check that bottle seals are intact before purchasing and prefer well-known brands sold by reputable retailers.

Water purification tablets and portable water filters are useful options when bottled water is unavailable or impractical, such as on hiking trips or in very remote areas. Tablets based on chlorine dioxide are effective against a wide range of pathogens including Cryptosporidium, which is resistant to simple chlorine tablets. A travel health nurse or pharmacist can advise on the most suitable option for your destination.

Hot drinks made with water that has been brought to a full boil, such as tea and coffee, are generally safe in most destinations, as boiling kills the organisms that cause the most common travel illnesses. However, ice added to cold drinks made from boiled water nullifies this protection if the ice was made from untreated tap water.

Canned and sealed bottled soft drinks are safe in almost all destinations. Fresh juices made from fruits washed in tap water, or blended with ice of uncertain origin, carry the same risks as unpeeled raw produce.

Choosing Where to Eat

The choice of restaurant or eating establishment has a significant impact on food safety risk. A few general principles apply across most destinations:

Busy establishments tend to have higher food turnover, which means ingredients are less likely to have been sitting around for long periods. A popular local restaurant with a constant stream of customers is often a better choice than an empty one with low patronage.

Observe the general cleanliness of the front-of-house area. If the dining room is poorly maintained, the kitchen is likely to reflect similar standards. Conversely, visible cleanliness is a reasonable positive indicator.

Street food carries a mixed reputation, but in many parts of the world it represents some of the safest food available precisely because it is cooked fresh to order over high heat in front of you. A street vendor preparing dishes to order, using fresh ingredients, and cooking at high temperatures can be a safer choice than a restaurant buffet where food has been standing.

Hotel restaurants in established international hotels typically maintain higher hygiene standards and are generally a safe choice, though they are not entirely risk-free. Staff training, inspection requirements, and the reputation risks associated with making guests ill create incentives for higher standards.

Be cautious about eating at establishments that have had their produce delivered in poor conditions, have inadequate refrigeration visible, or where staff do not practise obvious hand hygiene. These are not guarantees of a problem, but they are reasons for caution.

Specific Foods to Approach With Caution

Beyond the general principles, certain specific foods carry higher risk in many destinations and are worth approaching with particular caution.

Shellfish and raw seafood concentrate pathogens from the water in which they live and are among the most commonly implicated foods in serious food poisoning cases worldwide. Raw oysters, clams, and similar molluscs should generally be avoided in high-risk areas. If you wish to eat seafood, choosing thoroughly cooked options substantially reduces the risk.

Undercooked meat and poultry, particularly pork and chicken, carries risk of Salmonella and Campylobacter. Ask for meat to be well cooked and check that it is cooked through before eating. This is particularly important for minced meat products such as burgers and meatballs.

Unpasteurised dairy products including soft cheeses, fresh milk, and yoghurt made from unpasteurised milk can carry pathogens including Listeria, which is particularly dangerous for older adults with reduced immune function. In destinations where pasteurisation standards are uncertain, choosing packaged dairy products from established brands reduces this risk.

Buffets require particular judgement. The key questions are how long food has been sitting out, whether hot food is actually maintained at a safe temperature, and whether the serving utensils are being changed regularly to avoid cross-contamination.

Food Safety and Medications

Some medications affect how the body responds to food contamination. Antacids and proton pump inhibitors, which are widely prescribed for reflux and ulcers, reduce stomach acid. Stomach acid is one of the body's natural defences against ingested pathogens, so lower acid levels can allow harmful organisms to survive passage through the stomach in greater numbers.

Antibiotics alter the balance of bacteria in the gut, sometimes making the bowel more susceptible to infection by pathogens that would normally be outcompeted by the resident gut flora. If you are taking antibiotics while travelling, you may have somewhat higher vulnerability to food-related illness.

Some travel clinics prescribe a course of antibiotics to be taken at the traveller's discretion if diarrhoea develops, known as standby treatment. This approach is sometimes recommended for older travellers or those with specific health conditions. Discuss this option with your GP or travel health nurse before departure.

Recognising and Managing Food Poisoning While Travelling

Despite all precautions, illness can still occur. Knowing how to recognise and manage it helps you recover more quickly and avoids complications.

Symptoms of food poisoning typically begin within a few hours to a couple of days of eating contaminated food and usually include nausea, vomiting, diarrhoea, stomach cramps, and sometimes fever. Most cases resolve within two to five days without specific treatment.

The most important immediate priority is preventing dehydration. Drink small sips of clean water or oral rehydration solution frequently. Oral rehydration sachets, which replace the salts and sugars lost through vomiting and diarrhoea, are available at pharmacies in most countries. If you are unable to keep fluids down, seek medical attention.

Over-the-counter medications such as loperamide can reduce the frequency of diarrhoea and are useful in situations where urgent travel is necessary. However, they should be used with caution in cases where there is blood in the stools or high fever, as these symptoms may indicate a more serious infection that should not be suppressed. Medical advice is preferable in these circumstances.

Older adults who become significantly dehydrated, who have a prolonged or worsening illness, who have bloody diarrhoea, or who have a high fever should seek medical attention rather than managing solely with self-treatment. Travel insurance that includes medical cover is essential precisely for situations like this, as medical care abroad can be expensive and access to it can be complicated without insurance documentation.

Preparing Before You Travel

Good preparation before departure reduces both the risk of food-related illness and the impact if illness does occur. Consulting a travel health clinic four to eight weeks before a trip to a higher-risk destination allows time for any recommended vaccinations to take effect. Hepatitis A vaccination, which is highly effective and provides long-lasting protection, is recommended for most travellers to medium and high-risk destinations. Typhoid vaccination is also recommended for some regions.

Pack a small travel health kit that includes oral rehydration sachets, an antidiarrhoeal medication, antinausea medication, and any prescription treatments recommended by your doctor. Ensure that your kit is readily accessible in your hand luggage rather than packed away in checked baggage, as illness may begin during the journey itself.

Being well rested and adequately hydrated before a long journey supports immune function and reduces vulnerability. Travelling when in good health, avoiding illness before departure by managing known exposures, and arriving at your destination without being significantly run down all provide a stronger foundation for the days ahead.

Enjoying Food as Part of Travel

Food is one of the great pleasures of international travel and one of the most vivid ways of experiencing other cultures. The goal of food safety awareness is not to create anxiety around eating but to provide a framework for making informed choices that allow you to enjoy local cuisine confidently.

With the right preparation, awareness of the main risks, and sensible habits around water and food choice, most older travellers will have no significant problems. When issues do arise, knowing what to do and having the resources to respond means you can manage them effectively and return to enjoying your journey.