There is no essential difference between the effect and the food rich in protein. After all, protein powder is also extracted from milk. Protein powder is a tonic to supplement protein. If the subject has just started to engage in fitness, I personally think it is unnecessary. At first, he mainly focused on the quality of fitness, mainly to familiarize the subjects with the process, and then consider whether to eat or not. When the subjects are familiar with all this, there is no need to eat protein powder if the subjects can get enough protein in their daily diet. If he can't get enough protein, he can eat some protein powder, the amount should be controlled, and at the same time, he needs to get enough sleep every day.