Although no single food can control cancer, a reasonable and healthy diet is important to prevent the occurrence of tumors. At present, it is advocated that the amount of animal protein eaten should be limited to 1/3, and most of the other nutrients should be provided by plant foods. Fruits and vegetables are rich in anti-cancer nutrients, and the brighter the color, the more these nutrients. In addition, these fruits and vegetables are good for maintaining or achieving ideal body weight, which also helps to reduce the risk of tumor development. Being overweight is associated with an increased risk of many tumors, including colon cancer, esophageal cancer and kidney cancer. Eating a variety of vegetables, especially dark green, red and orange vegetables, can help fight cancer. Folic acid is an important B vitamin that protects and prevents the development of colorectal and breast tumors. Folic acid is found in high amounts in grains and cereals, as well as in fruits such as citrus, melons and strawberries. Other sources of folic acid include asparagus, eggs, soy, sunflower seeds and leafy greens. The vitamin may help protect the body from tumors. However, it should be obtained through the intake of natural foods such as nuts, fruits and leafy greens. The assisted anti-cancer effect obtained in this way is far better than taking vitamin tablets by mouth alone. And while sugar alone is not known to directly cause cancer, it may interfere with the protective and anti-cancer effects of other nutrients. The added calories from sugar can lead to overweight and obesity, and excess weight is also a cancer risk factor. So sugar should be avoided, and instead, fruit can be substituted for the need for sweetness, with a good dose of vitamins as a side benefit. According to research, lycopene or some other substance in tomatoes is effective in reducing the risk of some cancers, including prostate cancer. That’s why tomato paste, tomato juice, etc. all have anti-cancer properties. Grapes and grape juice, especially purple and red grapes, contain resveratrol. Resveratrol has strong antioxidant and anti-inflammatory effects. In laboratory studies, resveratrol has been found to prevent the cell-damaging effects of carcinogenic factors. However, there is not enough evidence to say that eating grapes, drinking grape juice or wine can cure cancer. In addition, strawberries and tree plums contain the phytochemical ellagic acid. This powerful antioxidant fights cancer in different ways, including deactivating carcinogens and inhibiting the growth of cancer cells. Finally, blueberries are scavenged by antioxidant action before free radicals damage cells, and their potential antioxidant effects are of great value in maintaining the health of the body. Cruciferous vegetables include cauliflower, kale, cabbage, and collard greens. These vegetables can be made into salad dishes or sautéed, both of which taste good. But most importantly, some of the ingredients in these vegetables are known to help the body fight colon, breast, lung and cervical cancers. Green leafy vegetables include mustard, lettuce, chicory, bok choy, spinach, lettuce and beets. They are rich in fiber, folic acid and carotenoids. These nutrients help the body fight oral cancer, throat cancer, pancreatic cancer, lung cancer, skin cancer and stomach cancer. In addition, curcumin, the main ingredient in the Indian spice turmeric, has the potential to inhibit cancer. Experimental studies have found that it inhibits the transformation, proliferation and invasion of many types of cancer cells It is well known that soy is good for health and mostly contributes to anti-cancer effects. Soy contains phytochemicals that may protect the body’s cells from the effects of cancer-causing factors. Experiments have found that chemicals in soy slowed tumor growth and inhibited tumor-secreting substances from attacking adjacent cells. Although there are sporadic reports on tea’s anti-cancer properties, green tea may have strong anti-cancer effects. In laboratory studies, green tea has been found to slow and prevent the growth of colon, liver, breast and prostate cancer cells. Green tea has likewise been found to act on lung tissue and skin tumors. Tea consumption is also effective in reducing the risk of bladder, stomach and pancreatic cancers. And drinking plenty of water not only quenches thirst, but also protects and prevents bladder cancer. Water not only dilutes potential carcinogens in the bladder, but also reduces the time that carcinogens remain in the bladder due to the increased urination caused by drinking large amounts of water. However, the amount of alcohol consumption needs to be controlled. Cancers of the mouth, throat, esophagus, liver and breast have been associated with alcohol consumption. Alcohol can also increase the risk of colorectal cancer. Finally, the way meat is cooked can also have an effect on tumor development. Frying, grilling, or roasting meat can alter some of the substances in the meat due to the high temperature and increase the risk of cancer when consumed. Stewed, boiled and steamed meats have less chance of producing these chemicals. It would be healthier to add some protective vegetables to the meat stew. Also, buy less smoked and cured meats in delis, which may have tumor-inducing effects due to the presence of certain chemicals.