Look at the brand first. Generally speaking, famous brands are not fake, such as Mengniu Yili; Second, look at the packaging, good milk packaging will not be too bad; The third is nutrition. Generally, the protein content of pure milk is between 2.5 and 3.2. Fourth, the smell, good milk generally has a strong milk flavor. There are many kinds of milk drinks on the market, including pure milk, pure fresh milk, fresh milk, yogurt, flavored milk and milk-containing drinks. In fact, these milk drinks can be divided into pure milk and milk-containing drinks according to different ingredients. Pure milk is also called fresh milk and pure milk. As can be seen from the ingredient list of the product, there is only one ingredient in this product, namely fresh milk.