1. Whey protein is the most suitable raw material for manufacturing sports nutrition in protein.

Compared with other kinds of high-quality proteins, whey protein production technology has developed the fastest. At present, various manufacturers have developed a variety of whey proteins, including "WPCS" concentrated whey protein, "WPIS" separated whey protein and EWPFS (fortified whey protein). WPCS whey protein concentrate contains WPC34 (that is, the purity of whey protein reaches 34%), WPC50 and WPC80；; The concentration of whey protein separated by "WPIS" is generally high, and WPI80 and WPI90 are common. These products are very digestible protein with high biological value, which can be used to make protein bars and protein powder. Among them, WPC80 is the most widely used because of its stable quality, the best comprehensive physical and chemical indicators and easy deployment. Therefore, WPC80 has become the mainstream raw material in whey protein. WPI whey protein has high production cost and is only used in the production of some products with special requirements. Compared with WPC80, WPI whey protein has little advantage. WPC80 is the protein of American champion sports nutritious food.

Secondly, whey protein is the best protein for athletes.

In order to keep healthy and meet the basic needs of human body for protein, American ADA (American Dietetic Association) suggested that 0.8g of protein should be supplied per kg of body weight in one day. But for a certain person, it is difficult to grasp this hint because of the differences in lifestyle, physical condition, age and gender. Especially for athletes, the demand for protein has changed greatly due to the differences in exercise mode, exercise time and exercise intensity, and this suggestion is even more unrealistic. Therefore, some sports nutritionists recommend that protein food should be arranged according to the daily protein intake of 1.5g/kg, which can basically meet the requirements of athletes in theory and ensure the normal balance of protein metabolism of athletes. However, in practice, for some powerful athletes such as weightlifting, wrestling and bodybuilding, only by increasing the intake of protein to 2g/kg can the positive nitrogen balance in these athletes be barely maintained. At the same time, a new problem appeared. While ingesting so much protein, a lot of fat and cholesterol also enter the human body, which also brings many negative effects to athletes. Further research shows that only 40% of some inferior protein can be used by human body, while the utilization rate of equivalent whey protein can be as high as 70% (no protein 100% can be used by human body). It can be seen that only by choosing high-quality protein can athletes improve the utilization rate of protein and avoid the harm caused by inferior protein. In other words, taking 1.5g/kg of high-quality protein is better than taking 2g/kg of inferior protein.

In recent years, the research on the application of whey protein in sports found that the advantage of whey protein is not only to maintain the positive nitrogen balance of athletes, but also to have some functions that are very suitable for sports needs compared with other kinds of protein: ① Whey protein is rich in bioactive calcium, which can reduce the fracture during sports and prevent the loss of bone calcium; ⑵ Whey protein is rich in glutamine, which can accelerate the biosynthesis of muscle glycogen after exercise and prevent the decline of immune function after transitional exercise. ⑶ Whey protein has certain anti-fatigue effect. The reason is that whey protein contains cysteine and methionine which can resist free radicals; ⑷ Whey protein can promote the secretion of endogenous growth hormone in human body to some extent. Taking whey protein can quickly gain muscle and reduce body fat. So far, the research on the influence of whey protein on sports training is still going on.

At the end of this investigation report, nutritionists fully affirmed the dominant position of whey protein in protein products, and predicted that whey protein products may be further developed according to the different requirements of sports, and the future whey protein products will be more detailed. For example, whey protein for recovery, whey protein for muscle gain, whey protein for fatigue resistance, etc. By then, athletes will have a wider choice.