Is It Safe to Consume Lumpy Milk?

Whether lumpy pure milk can be consumed depends on the specific situation. If the protein denaturation and precipitation are only caused by low temperature, enzyme activity, etc., and there is no change in taste or color, although the nutritional value of this pure milk has been reduced, it can still be consumed with little impact on health. However, if the milk is contaminated with bacteria or expired, the protein in it will deteriorate, resulting in a severe acidic and pungent odor. Some may even experience a change in milk color, and this kind of milk should not be consumed. Generally speaking, the shelf life of milk is not very long. If it is not stored properly, it is easy to become lumpy. At this time, the lumpy milk should not be consumed. Consuming such milk can easily cause diarrhea or acute gastroenteritis and other diseases. Therefore, when purchasing milk, it is advisable not to buy too much at a time.

Enzyme action: Pure milk contains a certain amount of enzymes because it has not been processed through heating or enzyme inactivation. Although the amount of enzymes is small, they can slowly cause protein denaturation in the milk during storage, leading to the formation of lumps.

Low temperature: Proteins undergo denaturation at high and low temperatures, as well as in acidic and alkaline environments. Many people store pure milk in the refrigerator to keep it fresh, but some may even place it in the freezer. This low temperature can also cause pure milk to become lumpy.

Deterioration: All milk is rich in nutrients and moisture, making it a perfect medium for bacterial growth. It also has a certain shelf life. If it is contaminated during storage, it is prone to deterioration, which can manifest as lumpy, sour, or discolored milk.