Nutrition of milk
Milk is the only food after the mammal's birth. Fresh milk not only contains all the nutrients contained in other foods, but also contains biologically active substances that are not found in millions of foods in the world (some called it "life bursts"). Therefore, there is a saying in China that "gold, mercury, and water are inferior to milk." Milk is the milk secreted by cows after their calving. Because the dairy cows are easy to breed and have high yields, dairy products in the world are mainly producing milk. Fresh milk contains various biologically active substances, including cytokines (such as interleukins), active genes, hormones, and immunoglobulins. They are synthesized by various cells and have corresponding biological activities. Animals have trillions of cells born and died each day, and are inseparable from the control of these active substances. Their molecular weight is so small that they can enter milk. Although its content is small, but its role is quite powerful, it can be described as "a matter of twos." Animal immunity has three major functions: First, it is a defense function, specifically eliminates microorganisms such as foreign bacteria and viruses. Second, it is a stable function. It is responsible for the repair or elimination of tissue cells damaged or killed in vivo, and maintains the stable state of the internal environment of the organism. The third is the monitoring function, timely removal of abnormal mutant cells. The immune function of young animals is not yet fully developed. There are few immune substances in the body and the immune system is weak. They can only rely on breast milk for supplementation. This is also why breastfeeding has been strongly advocated in recent years. However, these biologically active substances in milk are very hot. Scientist Pasteur has demonstrated through extensive scientific experiments that if the temperature exceeds 85°C during processing, the nutrients in milk will be destroyed in large quantities. Therefore, people call milk pasteurization below 85°C as pasteurization and treat it as the most scientific process of milk. Fresh milk produced by pasteurization has basically the same nutritional value as raw milk. However, in recent years, there has been the emergence of room temperature milk, also known as UHT milk. This kind of milk is filled with ultra-high temperature sterilization at 130-150°C. This sterilization method not only destroys all biologically active substances and most of the vitamins in the milk, but also makes calcium ions that are easily absorbed by humans bind to the casein of milk, forming complexes that are not easily absorbed by humans. Normal temperature milk has been popular in some countries, but at present, developed countries have banned the use of ultra-high temperature processing of milk. From the nutritional point of view, the rank order of nutritional value of various milks is: fresh milk is gold, yoghurt is silver, milk powder is copper, and room temperature milk is iron. If the nutritional value of milk is evaluated according to the package, then 100 tons of fresh milk is used in the house carton, 90 points is used in glass bottles and plastic bags, 80 points of yogurt is fermented with raw milk, 60 points is fortified milk powder, and is fermented with milk powder. 50 points of yogurt, 40 minutes of room temperature milk. Because the production of house-type carton fresh milk has the highest requirements on the quality of raw milk, filling aseptic conditions and shelf life are also the best. Fresh milk in glass bottles and plastic bags was scored low due to factors such as protection from light and poor ventilation. In addition, milk has a strong absorption of odor characteristics, such as milk and green onions together, the next day the milk will have onion flavor. If plastic milk is used in plastic bags, plastic odors are inevitable. From this point of view, the nutritional value of room temperature milk is ranked last. Yogurt scores higher than room temperature milk because it does not contain antibiotics and contains beneficial lactic acid bacteria. Milk powder is scored higher than room temperature milk because milk powder contains many vitamins and calcium, iron, zinc and other minerals. The reason why foreign milk powder is expensive is that it sells mainly brands. Compared with fresh milk, the highest score for all kinds of milk powder is only 60 points. The reason that normal temperature milk is popular is due to advertising effects. Its four major selling points are: 1. Convenient. FCL sale and room temperature storage can be stored for tens of days to several hundred days. 2. Grassland concept. People can often see slogans such as "Our cows eat grass and drink mineral water" in TV commercials. In fact, the nutritional value of milk produced by dairy cows that eat grass as the staple food is not as good as the milk produced by scientifically raised dairy cows. 3. The production date is near. The state expressly stipulates that milk at room temperature must pass the 7-day fungal inspection before being listed. However, most of the normal-temperature milk is shipped immediately after processing, so the production date marked on the normal-temperature milk packaging is mostly within one week. 4. The taste is fragrant. Due to the addition of chemically-synthesized high-fat ingredients such as fresh milk flavored cream or cream, normal-temperature milk generally has a rich and delicious taste. Medical Splash-proof Isolation Mask Face Shield,Medical Isolation Mask,Splash Proof Isolation Mask,Protective Isolation Face Shield GUANGDONG JIANGMEN RONGHAI MEDICAL TECHNOLOGY CO.,LTD , https://www.kimaomedical.com