According to the national milk protein standard, the content of protein in pure milk is 2.8%-3.3%, that is to say, 100ml pure milk must contain 2.8-3.3g of protein. However, for this standard, the actual implementation of each enterprise is also slightly different. For example, Mengniu and Yili adjusted the standard to 2.8g, while Guangming and some other enterprises organized their own farming and dairy industry alliance, and set the content standard of protein to 3g, which is the same as that of Europe and America. It still depends on the corporate conscience.
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In the modern fast-paced social environment, consumers have higher requirements for the quality and nutrition of milk. For example, I work 996 hours a day, and I often don't have time to cook by myself, so I often order takeout, but I think we all know what nutrition takeout can have and want to supplement the protein that my body needs every day.