China’s new cancer patients account for more than 20% of the world’s new patients every year. The following 10 popularized knowledge can increase the knowledge of patients and doctors about cancer. Breast cancer is the most common tumor among American women and the second leading cause of death among women, second only to lung cancer. Postmenopausal women who are overweight have a significantly increased risk of developing breast cancer. This is related to excess fat leading to high estrogen levels in the blood. Excessive alcohol consumption and inadequate folic acid intake also increase the risk of breast cancer. Physical activity can reduce this risk. Colorectal cancer is the second leading cause of cancer deaths in the United States. Obesity is directly related to it, and it is especially significant in men. Large intake of vegetables and fruits and grains with crude fiber, reducing the intake of red meat and processed meat food, proper intake of vitamin D and calcium, and strengthening daily physical activity can reduce the risk of its occurrence. In addition, regular screening, timely detection and removal of intestinal adenomas (precancerous lesions) are also crucial. 3.Lung Cancer The number one cause of cancer deaths in the United States. More than 85% of the patients’ morbidity is related to tobacco. Smoking cessation and large intake of vegetables and fruits can help reduce its occurrence. But be careful: excessive consumption of carotene and vitamin A-containing health food, on the contrary, will make smokers of lung cancer risk factor increases. Endometrial cancer is the 4th most common cancer among women in the United States. Endometrial cancer is related to estrogen level. Through a lot of exercise, increase the intake of vegetables, fruits, crude fiber food and beans, and maintain a healthy body weight can reduce the possibility of its occurrence. Kidney cancer accounts for 3% of cancer incidence and death in men and 2% in women. Directly related factors are obesity and smoking. Therefore, it is especially important to quit smoking and maintain healthy weight. Pancreatic cancer is the 4th leading cause of cancer death in the United States. Smoking, type 2 diabetes, excessive consumption of red meat and insufficient physical activity are extremely related to it. Cancer of the upper respiratory and digestive tracts Alcoholism and smoking significantly increase the likelihood of cancers of the oral cavity, pharynx and esophagus. Diet overheating leads to esophageal burns, which can trigger chronic inflammation of the esophagus and eventually deteriorate into esophageal cancer. Changing bad dietary habits, quitting smoking and drinking, losing weight and eating more fresh vegetables and fruits are conducive to reducing the risk of its occurrence. 8, prostate cancer, the most common cancer in American men. Consuming more tomatoes, cauliflower, beans and fish can help reduce the risk of its occurrence. The protective effects of vitamin E and selenium and the corresponding supplemental health foods are not yet conclusive. Excessive calcium intake, on the other hand, has been associated with highly malignant prostate cancer, so excessive calcium intake or supplementation with excessive calcium tablets is not recommended. In addition, statistics found that overweight and obese prostate cancer patients have poor treatment effect. Gastric cancer is the fourth most common cancer and the second most common cancer in the world in terms of mortality rate. The occurrence of stomach cancer is mainly due to excessive intake of pickled food and gastric Helicobacter pylori infection, which leads to chronic gastritis and gastric ulcer. Bladder cancer is related to smoking and certain chemical substances. Data show that consuming a lot of fruits and vegetables and drinking a lot of water can help reduce the risk of its occurrence. Meanwhile, ovarian cancer and other malignant tumors such as brain tumor, lymphoma and leukemia have not yet been found to have significant correlation with nutrition, diet and weight.