Tumor prevention starts from children At present, there are five unfavorable factors for children to prevent cancer: 1. Diet is too fine, lacking many kinds of fiber and green vegetables; 2. Too many additives in food, such as antibiotics, hormones and heavy metals and other toxic substances in agricultural and sideline products are harmful to children; 3. Serious pollution of air, water and indoor decoration in living environment; 4. Electronic dust and electronic particles brought by many household appliances such as computers pollution, affecting children’s central nervous and immune functions; 5. Obesity and high-fat diet can cause an increase in estrogen, making girls menstruate earlier, which is closely related to the incidence of breast cancer. Suggestions: Children should establish a scientific lifestyle from childhood, live a regular life, be good at regulating psychological stress, eat a rough diet, and strengthen exercise to enhance their resistance to disease.