"Lifestyle cancers" is a tumor scholars who propose to cautionary statement. European cases of childhood cancer increased year by year, of which 17% of cases with modern lifestyles and environmental change. As a major factor in cancer kept in people's lives into acts, therefore, to change the unhealthy lifestyle and eating habits, maintain a good lifestyle to maintain a healthy state of mind can be avoided almost 1 / 3 of the incidence of malignant tumors, in this sense we can say that cancer is preventable and treatable.

Closely related to lifestyle and cancer, of which the relationship between diet and cancer, is most closely. In China, a higher incidence of cancer of the digestive tract and urinary tract cancer and breast cancer related more with the diet. Meat consumption and higher fat intake are related to prostate cancer and colorectal cancer incidence and mortality increase related. High-fiber foods can prevent breast cancer and prostate cancer. Alcohol and long-term consumption of salted or mold contaminated foods can lead to oral cancer, esophagus, stomach and liver cancer. A high intake of vegetables, vitamins (vitamin A, B, C, E) and folic acid to reduce the fat diet can reduce the risk of cancer. In Western countries, breast cancer, colorectal cancer, prostate cancer and endometrial cancer, and so has a high morbidity and mortality, diet study found that in these countries, the total fat calories to 40% ~ 50%. The total calories in the fat content of less than 20% of the population occurrence of the above significantly reduced the risk of cancer.