1, which may be hereditary.
(1) is not necessarily a direct inheritance.
First of all, we should know that cancer is generally not directly inherited. For example, if a person has cancer, even if it is passed on to his children or offspring, the offspring will generally not show cancer when they are born, but will only show cancer during their growth or adulthood at most. Most genetic guesses show that many cancer patients have a family history of cancer, so cancer may be inherited, but it is generally not directly inherited.
② It may also be atavism.
Another possible genetic feature of cancer is atavism. For example, if a person has cancer, his parents may not have cancer, but some of his grandparents or the older generation have cancer, which is also the result of many statistics. So cancer is possible in atavism.
(3) Many of them have no medical certificates.
Although it is mentioned above that cancer may be passed on to the next generation or atavism, the genetic theory of cancer has not been proved by accurate medical arguments and experiments so far. The theory of cancer inheritance is mostly a data conclusion through the adjustment of some cancer families.
2. Food to prevent cancer
(1) garlic
People who often eat raw garlic have a very low incidence of gastric cancer, because garlic can significantly reduce the content of nitrite in the stomach, and nitrite is a very important cause of gastric cancer. The incidence of gastric cancer in people who often eat onions is 25% lower than that in people who eat little or no onions. In addition, eating less pickled food and smoked and grilled fish is also a good way to prevent gastric cancer.
(2) Mushrooms
It has the reputation of "the first anti-cancer dish", such as cauliflower, mushroom, mushroom and so on. Because it contains anti-cancer active substances of polysaccharides, it can promote the formation of antibodies, make the body immune to tumors, inhibit the growth of tumor cells, and resist various cancers including lymphoma and intestinal cancer, especially for patients with liver cancer.
(3) carrots
Studies have found that carotene contained in carrots can be converted into vitamins in the body, and vitamin A has the function of preventing cancer. Carrots also contain more folic acid, which also has anti-cancer effect. Lignin can improve the body's immunity by 2-3 times, thus indirectly inhibiting or eliminating carcinogens and cancer cells in the body. In addition, molybdenum in carrots can also prevent cancer. So eating carrots often can prevent cancer.
(4) Cauliflower
Some studies have pointed out that this may be related to the natural folic acid contained in food. At the same time, because radish contains mustard oil, it can interact with enzymes in radish, which can promote gastrointestinal peristalsis, stimulate appetite and help digestion. In recent years, studies have found that radish also helps to fight pancreatic cancer.
(5) spinach
Spinach contains a variety of antioxidants, which helps to prevent cancer caused by free radical damage. Eating 1 bowl of spinach every day can reduce the risk of lung cancer by at least half. Besides, tomatoes, carrots, pumpkins, pears and apples can also prevent lung cancer.
(6) Zizania latifolia
Foods such as water bamboo and celery are rich in fiber. After food enters the intestine, it can accelerate the emptying speed of food residues, shorten the time of toxic substances in food staying in the intestine, and promote the excretion of bile acids, which is extremely effective in preventing colorectal cancer.
3. Prevent cancer and don't eat.
( 1)
Facts have proved that adequate intake of fruit and vegetable fiber can prevent colorectal cancer and reduce the incidence of esophageal cancer, breast cancer and other cancers. It is also recommended that tomatoes can reduce the incidence of prostate cancer; Bean sprouts, cabbage and broccoli can reduce the incidence of digestive system cancer; Garlic, onion and strawberry all have anti-tumor components.
(2) Rot
Related studies have confirmed that lutein, lycopene and carotene are not afraid of heat, and cooked food has better cancer prevention effect than raw food. Especially tomatoes, carrots, broccoli and cruciferous vegetables rich in carotenoids. Moreover, the absorption rate of carotenoids in raw carrots is about 3% ~ 4%, which can be increased by 4 ~ 5 times after mashing or cooking. When broccoli is heated to 60 degrees, it has the best anti-cancer effect and can reduce the incidence of skin cancer, gallbladder cancer, lung cancer, gastric cancer and esophageal cancer.
(3) Less
A study confirmed that eating full is more likely to cause cancer than eating only eight points full. If you overeat, drink and smoke, you will easily suffer from digestive cancers such as pancreatic cancer, gastric cancer and esophageal cancer. It is recommended that everyone eat at least 20 minutes regularly to let the brain receive the signal of satiety in time. In addition, chew slowly and eat more foods that are easy to fill and have thicker fibers, such as konjac and beans.
(4) Others
The best way to prevent cancer is to eat a balanced diet, be vegetarian, not picky about food, and not eat food that is too cold or too hot. Properly matched, especially brightly colored foods are special anticancer drugs. Some expert organizations have made it clear that no food can prevent cancer. Although many studies have confirmed that plant foods contain certain nutrients and have certain anti-cancer effects, it does not mean that they are effective when eaten alone. It is suggested that two-thirds of the foods in your diet should be selected from fruits and vegetables, beans and whole grains.
(5) light
Light refers to eating less animal protein or high-fat food, eating more natural and light fruits and vegetables, and controlling the amount of salt. Eating less fat can prevent colorectal cancer, breast cancer and prostate cancer. You can choose skim or low-fat fresh milk, or you can use bean products to replace some meat, remove fat and skin, scrape off the cream from the crust, and use boiled brine instead of frying. Eat less salt and salty food, otherwise you are prone to stomach cancer. Instant noodles, potato chips and other supermarket foods have extremely high salt content. Eating out, the salt content of old duck soup, stew and braised dishes is also high.