In addition to genetic factors, genetic mutations and environmental factors, the development of cancer is also closely related to people’s daily eating habits, but this is no longer news. In the past, we mostly introduced some foods that can fight cancer, but this time, we classify them according to nutrients. Let’s see which nutrients the human body will have the possibility of causing cancer if it lacks them. 1.Lack of beta-carotene may induce lung cancer At present, lung cancer is still the cancer with the highest incidence in China. In addition to smoking, inhalation of too much eye and other factors can lead to lung cancer, the lack of beta-carotene in the human body may also induce lung cancer. Therefore, long-term smokers, tuberculosis patients and silicosis patients who are prone to lung cancer should eat more foods rich in deficient beta-carotene, such as sweet potatoes, carrots, spinach, mangoes, papaya and tofu. 2.Lack of protein may induce stomach cancer If people do not consume enough protein in their diet, especially the intake of high-quality protein, it may induce stomach cancer. In the past, stomach cancer was once called the “poor disease”. Therefore, people who are prone to stomach cancer, such as those with atrophic gastritis, gastric ulcer, immunocompromised people and those with family history of stomach cancer, should always eat foods rich in high-quality protein, such as deep-sea fish and shrimp, oysters, soybeans, lean meat and eggs. In addition, people who consume a lot of salted fish and pickled vegetables containing carcinogenic substances such as nitrosamines will also increase the chance of stomach cancer. If people consume too much salt, it may lead to atrophic gastritis. This disease is one of the common precancerous lesions of stomach cancer. Therefore, in order to prevent stomach cancer, people should reduce salt intake, and should eat more fresh fruits and vegetables and less smoked and barbecued foods. 3.Lack of dietary fiber may induce colon cancer In modern people’s diet structure, the proportion of high-fat and high-protein foods is increasing, while the intake of dietary fiber is decreasing day by day. High-fat and high-protein food will produce more carcinogenic substances after decomposition in human body. In the absence of dietary fiber, these carcinogenic substances will stay on the colonic mucosa for a long time, which can induce colon cancer. Therefore, people should eat more foods rich in dietary fiber in daily diet, such as barley, beans, carrots, citrus, oats, etc. 4. Lack of vitamin D may induce breast cancer The data from many clinical surveys show that the vitamin D level in breast cancer patients is often low. Canadian researchers also found that breast cancer patients with vitamin D deficiency have a higher mortality rate compared to those without this substance. Therefore, people who have a family history of breast cancer, women who have not had children, middle-aged and elderly women, women who have early menarche or late menopause, etc. should eat more foods rich in vitamin D such as fish, beef, pork liver and egg yolk, and should get sunlight regularly to encourage the body to synthesize more vitamin D.