There is no scientific basis for the claim that broccoli causes cancer, broccoli is rich in nutrients, moderate consumption of human body has certain benefits. Broccoli is rich in protein, vitamin C, calcium, phosphorus and other nutrients. Generally every 100 grams of fresh broccoli flower ball, containing 4.1 grams of protein, 51 mg of vitamin C, 67 mg of calcium, 72 mg of phosphorus, moderate eating can supplement the body needs part of the nutrients, and will not cause cancer. Note that when cleaning broccoli, can be placed in salt water soak for a while to be able to effectively remove vegetable insects. It is recommended to eat a moderate amount of broccoli, so as not to cause bloating and other gastrointestinal discomfort.