Heat is your best protection
Food cooked at high temperature right in front of you is almost always safe to eat. The heat kills bacteria and parasites. Watch the vendor cook your food to order: stir-fried noodles, grilled skewers, freshly fried snacks are all very low risk. The higher-risk items are pre-cooked food kept warm for long periods, raw salads washed in tap water, and cut fruit with exposed surfaces.
Look for volume and turnover
The best indicator of a safe street food stall is high customer volume. Busy stalls have fast turnover, meaning food does not sit around long enough to develop bacteria. Locals eating from a stall is a better safety signal than any hygiene certificate. A stall with a queue at midday and another at evening service is almost certainly safe.
Ice and water are the real risks
In countries where tap water is unsafe to drink, ice made from tap water is also unsafe. Most modern cities use commercially produced ice (cylindrical with a hole in the centre) which is made from purified water. The irregular crushed ice at small stalls is more likely to be made from tap water. Ask for drinks without ice if you are uncertain, and always buy sealed bottled water rather than refillable bottles of unknown origin.
Peel it, boil it, cook it, or forget it
This classic traveller's maxim is still good advice for raw produce. Fruit you peel yourself (bananas, mangoes, oranges) is very low risk. Fruit pre-cut and displayed (sliced watermelon, pineapple spears) carries higher risk in places without reliable refrigeration. Salads and raw vegetables in countries with unsafe tap water are the highest risk items, as they are often washed in local water.
Build tolerance gradually and carry treatment
Your gut microbiome adapts to local food environments over a few days. In your first 48 hours, be more conservative: eat cooked foods, drink only safe water, and avoid the most adventurous options. After a few days your system will handle more. Always carry oral rehydration salts (not just tablets: the electrolyte balance matters) and discuss whether prescription antibiotics for traveller's diarrhoea are appropriate for your trip with your doctor before you leave.
More travel tips
How to Pack Everything in a Carry-On (Even for 2 Weeks)
The definitive guide to the carry-on-only lifestyle - packing cubes, the roll method, and the 5-4-3-2-1 formula.
How to Eat Well Abroad and Never Fall into a Tourist Trap
Simple rules for finding genuinely great local food in any city - and the red flags that tell you to walk away.
Flight Hacks: How to Get Better Seats, Skip Fees, and Arrive Fresher
Insider knowledge on booking windows, seat selection, upgrade strategies, and surviving a long-haul flight in economy.