The difference between skimmed cow's milk and raw cow's milk is as follows:

Skimmed cow's milk is a product that has been artificially processed, while raw cow's milk is the unprocessed liquid from the cow's body, and the shelf life of skimmed cow's milk is often longer after artificial processing, which makes it easier for people to save it and carry it around to drink. The shelf life of raw cow's milk is shorter,

Raw cow's milk tends to contain higher fat, while skimmed milk tends to remove these fats using technology, raw cow's milk refers to the milk of fresh milk, need to be pasteurized before drinking, raw cow's milk is rich in immunoglobulins, high efficiency resistance to viruses, and supplement the growth of the calcium necessary for the development, skimmed milk is the milk of fresh milk with physical methods to remove most of the fat and the remaining part of the milk. The remaining portion of the fat is removed by physical means.

Homemade skimmed milk method:

The fat in the milk is removed by centrifugation. Due to the lightness of the milk fat contained in the milk, the milk floats on the surface of the milk. Leave the fresh milk overnight and then remove the floating milk fat with a straw or spoon to form low-fat milk.

Boil the fresh milk, wait for the surface of the milk to cool, the formation of milk skin, which is fat skin, after the removal of fat, fat contained in skimmed milk decreased by 1%, you can let the fresh milk stand overnight or boiled 3 times, you can reduce the fat to a minimum, to become skimmed milk.