Food Safety Guide for Koh Samui

Street food in Koh Samui is generally safe and is an essential part of the Cambodia culinary experience — Bangkok was ranked the world's best street food destination by CNN Travel for multiple years running. The key to staying healthy is choosing the right stalls. Look for vendors with high customer turnover, especially those popular with Cambodia locals, as frequent cooking means fresher ingredients and less time for bacteria to multiply. Food should be cooked fresh to order and served piping hot — avoid pre-cooked dishes that have been sitting at ambient temperature, as Cambodia's tropical heat (30-38°C) accelerates bacterial growth. Stick to sealed bottled water and be cautious with ice: ice produced commercially (tubular or cylindrical shape with a hollow center) is made from purified water and is safe, while irregularly shaped crushed ice from unknown sources should be avoided. The most common illness among tourists in Koh Samui is traveler's diarrhea, typically caused by unfamiliar bacteria rather than unsafe food — probiotics started 2 weeks before travel and careful handwashing can reduce your risk by up to 50% according to travel medicine research. If you do experience gastrointestinal issues lasting more than 48 hours or accompanied by fever, visit a pharmacy or hospital in Koh Samui for appropriate treatment.