. Nearly half of bodybuilders have used whey protein, and its position in muscle building and shaping has long been recognized. However, the fitness supplement market is mixed. How to ensure that the purchased whey protein must be genuine? Whey protein is an animal protein, which is contained in the milk of almost all mammals. Whey protein for fitness is generally extracted from milk, which is generally expensive because of its very small content. At present, the market is flooded with a number of low-priced proteins such as soybean protein and egg protein that pretend to be whey protein. After blending and deodorizing, they pretend to be a brand of whey protein for sale, thus making huge profits. This article provides three methods to help you check when purchasing whey protein: 1. First, choose regular manufacturers and well-known brands, and call the manufacturers to ask whether the place of purchase has been authorized by the manufacturers. 2. If you have bought whey protein, take a small amount and rinse it with boiling water. Soybean protein will dissolve quickly in boiling water, while protein powder will appear flocculent and granular white objects. 3. Well-known brands of whey protein, such as Kangbite, have anti-counterfeiting labels, which can be viewed. 4. You can find local conditions to test the content of protein, and the content of protein in whey protein is above 80%. 5. Check whether the package is in good condition, so as to prevent the fake from confusing the real.