Generally speaking, if kept at room temperature, the shelf life of yogurt is 3 to 5 days. If it is stored at room temperature, it is easy to deteriorate if it is not eaten at one time after opening. It is recommended to drink the opened yogurt on the same day, otherwise it will easily deteriorate at room temperature. If you need to store yogurt at room temperature, you should drink it as soon as possible, because the active bacteria of yogurt will die about 1 hour. During the storage of yogurt, it should be placed in a low temperature environment, not in a high temperature environment, so as to avoid excessive fermentation of yogurt and affect the taste. Besides, if yogurt turns sour, you can't eat it any more.
Please note that if the food has expired or gone bad, please do not eat it.