It is unscientific that protein powder promotes the growth of cancer cells, and taking protein powder in moderation is favorable to the physical recovery of cancer patients. The main component of protein is protein, which also contains vitamins and carbohydrates, these substances are essential for human growth and development, and can be used as enteral nutrition preparation in clinical practice, which can help some post-surgery or tumor patients to supplement nutrients. Cancer patients are physically weak and need nutrients for physical recovery, and proper consumption of protein powder is conducive to the physical recovery of cancer patients and will not promote the growth of cancer cells. However, protein powder should be taken according to the amount specified in the instruction manual, as overdose may also cause harm to the body.