But the nutrients will be destroyed after freezing. After milk is frozen, the fat and protein are separated, and casein is concentrated into powder, so the taste of milk will be obviously weakened, and the nutrients are not easily absorbed.

Too cold also has a bad effect on milk. If milk freezes into ice, its quality will be damaged. So don't freeze the milk, just put it in the refrigerator.

Extended data:

Method for identifying whether milk has gone bad.

1, sensory evaluation. Fresh milk (sterilized milk) is milky white or yellowish, with the inherent fragrance of fresh milk, no peculiar smell, uniform liquid, no precipitation, no coagulation, no impurities, no foreign bodies and no viscosity.

2. Pour the milk into clear water. Not melting is fresh milk. If it melts, it is not fresh milk. If it is bottled milk, it is not new milk as long as thinning phenomenon is observed on the upper part of the milk or precipitation is observed at the bottom of the bottle.

3. Boiling test method. Take about 10ml milk sample in a test tube (or a transparent glass) and put it in boiling water for 5 minutes. If there is coagulation or floc, it means that the milk is not fresh or has gone bad.

4, good milk, do not hang the cup. Buy milk (uncooked or heated in the microwave oven) and quickly pour it into a clean transparent glass, then slowly tilt the glass. If there is a thin milk film on the inner wall of the glass, it is easy to wash it down with water, which is fresh milk.

Such milk is sent to the processing plant in a short time, and the total number of bacteria is very low. If the milk film on the glass is uneven, even there are small particles visible to the naked eye hanging on the glass wall, and it is not easy to clean, indicating that the milk is not fresh enough.

People's Daily Online-How to tell if milk has gone bad? Milk storage skills