The occurrence of breast cancer is closely related to diet, so it is beneficial to the prevention of breast cancer to pay attention to the regulation of daily diet. 1. Fat control and weight loss: Research has found that cancer cells are initially in a “starting” state, and only when they are “stimulated” can they proliferate rapidly and develop. High-fat diet is the stimulant of breast cancer. Long-term intake of fat can make the body produce a lot of estrogen-like hormones and prostaglandin-like substances, which can stimulate the growth of cancer tumors in excess. A large intake of fat can also make the body fat and lower the immune function, which can give cancer a chance to take advantage of. Therefore, controlling fat intake, reducing obesity and improving immune mechanism and disease resistance of the body can effectively prevent and reduce the occurrence of breast cancer. The risk of breast cancer for women who drink alcohol is much higher than those who seldom drink alcohol. The risk of breast cancer for those who drink one or more glasses of alcohol per day is more than 45% higher than those who seldom drink alcohol, and this risk is most significant in premenopausal women. It is believed that alcohol can stimulate the secretion of prolactin in the anterior pituitary gland, which in turn is related to the occurrence of breast cancer. Therefore, women, especially those before and after menopause, should quit drinking and drink less alcohol. 3.Less coffee: coffee, cocoa and chocolate contain a lot of xanthine, which can promote benign breast hyperplasia, and benign breast hyperplasia is related to the occurrence of breast cancer. If women, especially premenopausal women, consume too much of these foods, the risk of breast cancer will greatly increase with the large intake of xanthine. Therefore, women, especially those above middle age, should drink less coffee and eat less chocolate. 4. Eat more fruits and vegetables: Research has found that coarse grains, vegetables and fruits contain a large amount of plant fiber, vitamins and trace elements that can prevent and slow down the development of cancer at all stages, among which soybeans, corn, edible mushrooms, seaweeds, garlic, tomatoes, oranges and berry fruits have the most significant effects. Therefore, eating more of these foods in daily meals is not only beneficial to health, but also helps to prevent breast cancer. 5.Eating fish is beneficial: According to the report, women in the United States, Switzerland, Canada and New Zealand who eat less fish food have a higher incidence of breast cancer, while women in Japan who consume more fish food have a lower incidence of breast cancer. Experts say that fish contains a fatty acid that has the effect of inhibiting the proliferation of cancer cells, so eating more fish regularly and appropriately is very beneficial to the prevention of breast cancer.