What is the difference between fresh milk and pure milk? How many hours can milk be kept at room temperature?

Pure milk is rich in minerals, such as calcium, phosphorus, iron, zinc, copper, manganese, etc. It also contains nutrients such as protein, trace elements, and lecithin. We usually use milk to replenish our bodies with nutrients to make the bones of adults and children stronger. Sometimes I am confused. Some boxes are marked with fresh milk, while some are marked with pure milk. What is the difference between fresh milk and pure milk? Please see the following introduction from Encyclopedia Knowledge Network.

Contents of this article

1. What is the difference between fresh milk and pure milk?

2. How many hours can milk be kept at room temperature?

3. Does pure milk contain preservatives?

What is the difference between fresh milk and pure milk

The main differences between the two are in shelf life, storage method, and sterilization method. The shelf life of fresh milk is usually one week, while the shelf life of pure milk is generally about half a year. In terms of storage method, fresh milk must be stored in a refrigerator, while pure milk can generally be placed in a dry and dark environment. In terms of sterilization method, fresh milk is pasteurized, while pure milk is sterilized at high temperature.

Fresh milk is more expensive than pure milk because it has relatively high requirements on milk source and production process, as well as special requirements on transportation and storage methods.

Since fresh milk is sterilized at a low temperature, the nutrients in the milk can be retained relatively intact, so the nutritional value of fresh milk is higher than that of pure milk.

Dairy products on the market can be roughly divided into three categories: fresh milk, pure milk and yogurt.

How many hours can milk be kept at room temperature?

Milk can generally be stored for 3-5 hours at room temperature. In summer, milk can be stored for a maximum of 1-2 hours after opening, and in winter it can be stored for about 1-2 days. Unfinished milk needs to be stored in the refrigerator as soon as possible. The low temperature of the refrigerator can delay the deterioration of pure milk, and it can be stored for about 1-3 days.

Milk is one of the oldest natural dairy products.

Fresh milk is a milky white or slightly yellowish uniform colloidal fluid with no precipitation, no clots, no impurities, no viscosity, and no odor.

The preservation of milk does not rely on adding preservatives, but on temperature control to ensure that the milk will not spoil within a certain period of time.

Does pure milk have preservatives?

Pure milk does not contain preservatives. The shelf life of pure milk varies depending on the sterilization and packaging process. Pure milk that is stored for a short period of time is mostly pasteurized, while pure milk with a shelf life of more than half a year is sterilized by ultra-high temperature.

Pure milk is rich in minerals, including calcium, phosphorus, iron, zinc, copper, manganese, etc. It also contains nutrients such as protein, trace elements and lecithin.

There is a difference between pure milk and fresh milk. The temperature of fresh milk sterilization is not high, which can preserve the nutritional active substances in the milk to the maximum extent. Pure milk: After high-temperature sterilization, the nutritional components of milk are greatly lost.

Fresh milk needs to be kept at a certain temperature and refrigerated during the entire process of transportation and sales. Pure milk: It only needs to be stored at room temperature away from strong light.