ChinaNet-InfoCenter Lifestyle diseases are non-communicable diseases caused by poor dietary habits, mental factors, smoking, alcoholism, physical inactivity and other poor lifestyle. Lifestyle diseases are mainly some common diseases, mainly obesity, cardiovascular and cerebrovascular diseases, such as heart disease, hypertension, coronary heart disease, diabetes and cancer are the category of lifestyle diseases. The World Health Organization has found that 60% of an individual’s health and life expectancy depends on lifestyle, 17% on environmental factors, 15% on biological factors, and only 8% on healthcare. Of lifestyle, 30% is determined by diet. So, what are the bad lifestyles related to cancer? First of all, one-third of cancers are caused by eating. For example, people who eat a diet that is too rough, hard, too hot, and eat too fast have a higher chance of getting esophageal cancer. People who consume too much high-protein, high-fat and fine grains have a higher incidence of colorectal cancer.” Excessive intake of high-fat, high-protein and fried diets in women also leads to higher incidence of cancer; intake of pickled food is closely related to stomach cancer; intake of moldy food is closely related to liver cancer; long-term alcohol consumption is closely related to head and neck tumors and oral tumors. In addition, smoking is also a very important cancer-causing factor. There are more than ten kinds of cancers related to smoking, such as lung cancer, oral cavity tumor, throat cancer, bladder cancer and so on. Current research has proved that there are more than 40 kinds of carcinogens in tobacco, and the incidence rate of lung cancer in long-term smokers is 8 to 10 times higher than that of non-smokers, and “passive smoking” will also increase the incidence rate of tumors. Adverse mental factors are also related to cancer. If a person has long-term mental depression, high pressure in life, and great sadness and happiness, it is not conducive to the prevention of cancer.