Yogurt that has expired for 1-2 days is not recommended for further consumption. Yogurt that has exceeded its shelf life may harbor pathogenic microorganisms, which may cause digestive discomfort such as vomiting and diarrhea, or even food poisoning symptoms after drinking. Expired yogurt stored under suitable conditions may not have undergone significant cosmetic changes, but it is often difficult to determine whether deterioration or bacterial growth has occurred, so continued consumption is not recommended. The shelf life of food is often defined as the amount of time a food can be stored to maintain its quality in a suitable designated environment. Yogurt usually contains a large number of live bacteria and probiotics, and exceeding the shelf life may reduce its original nutritional value and taste and flavor. Some of them may also change their properties, such as caking and precipitation. Yogurt that has exceeded its shelf life is more likely to breed bacteria and other disease-causing microorganisms, especially if it is stored in poor conditions or opened, which may induce acute gastroenteritis, causing nausea, vomiting, abdominal pain, diarrhea and other gastrointestinal discomfort, and in severe cases, excessive diarrhea may also lead to dehydration, such as reduced urine volume, weight loss, sunken eyes, and poor skin elasticity, which may endanger health. Yogurt needs to be stored in strict accordance with the product instructions. Unsuitable storage conditions may accelerate the deterioration of yogurt, so you cannot continue to drink it even if it has not reached its shelf life. Foods other than yogurt that have passed their shelf life should be avoided to avoid adverse reactions.