If you want to tell whether yogurt has gone bad, you can look at its packaging, see when its shelf life is, and also look at its appearance. If it has gone bad, it will produce a lot of gas, so don't drink the bulging yogurt, you need to check whether it is damaged.

2. Look at these roles

Generally, yogurt curd without deterioration is uniform, with uniform color and no bubbles. But if yogurt has gone bad, it will be liquid and may turn green and yellow.

Step 3 smell it

If you want to know whether the yogurt has gone bad, you can smell it. Fresh yogurt smells like milk, and spoiled yogurt smells like alcohol fermentation, which is easy to distinguish. You can also taste it. If yogurt has gone bad, the taste will change greatly and become sour. If you drink yogurt often, it is easy to tell.

Extended data

Precautions for drinking yogurt:

1, don't drink yogurt on an empty stomach. If you drink yogurt on an empty stomach, lactic acid bacteria are easily killed or inhibited by gastric acid in an acidic gastric environment.

Its nutritional value and health care function will be greatly reduced.

2. Yogurt should not be heated. If the temperature is too high, the enzymes produced by beneficial bacteria in yogurt will lose their activity due to high temperature. Instant purchase

Many yoghurts should be put in the freezer. Generally, the shelf life of yogurt is only 7- 14 days.

Brush your teeth when you drink yogurt before going to bed at night. If you drink yogurt before going to bed at night, drink it at least one hour before going to bed, and remember to brush your teeth in time, otherwise some acidic substances in yogurt will corrode your teeth.

4. Yogurt should not be mixed with certain foods, especially medicines. After all, yogurt is a fermented product, and some ingredients in yogurt may react with some active ingredients in drugs, which may make people poisoned. In addition, it is recommended to drink yogurt with starchy foods.