1.Walk 1 hour a day American “Reader’s Digest” magazine reported that a 30-minute walk after meals, or 4 hours a week, can reduce the risk of pancreatic cancer by half. Harvard University’s long-term study of 70,000 people also found that walking for one hour a day can reduce the chances of colorectal cancer by half. In addition, sweating after exercise can make the body of lead, strontium and other substances with sweat out of the body, which may help prevent cancer. 2.Drink 4 cups of green tea every day It has been reported that some experts have conducted 17 years of research on the cancer prevention effects of tea and found that oolong tea, green tea and black tea have good preventive effects on oral cancer, lung cancer, esophageal cancer and liver cancer. Among them, green tea, including Longjing, Biluochun and Mao Feng, has the most significant effect, and its cancer prevention-related ingredients are five times higher than those of other teas. However, it is best not to drink tea that is too strong and too hot. The best tea drinking temperature should be about 60 degrees Celsius, and the tea should be steeped for 5 minutes before the active ingredients can be dissolved in the water. 3, 15 minutes of sunshine every day Sunshine can play a role in cancer prevention by increasing the body’s vitamin D content. Insufficient vitamin D can increase the risk of breast cancer, colon cancer, prostate cancer, ovarian cancer and stomach cancer. To avoid increasing the risk of skin cancer by exposure to the sun, 15 minutes of sunlight per day is enough. 4.Open windows for half an hour every day Besides formaldehyde, there is also a very strong carcinogenic gas – radon and its daughter. It is usually hidden in granite, cement and tiles, and spreads indoors along the cracks in these places and enters human body through respiratory tract, which will induce lung cancer after a long time. By opening windows for half an hour every day, the concentration of radon can be reduced to the same level as outdoor. In addition, radon will also be generated after natural gas burning, so when boiling water in the kitchen, it is better to open the window and close the door connected with the living room. 5.Sleep enough 7 hours a day The survey found that women who sleep less than 7 hours a night have a 47% chance of breast cancer. This is because sleep produces a melatonin, which slows down the production of estrogen in women’s bodies, thus serving the purpose of inhibiting breast cancer. It is best to start washing up before 10:30 p.m., get ready for bed, go to sleep before 11 p.m. and get up at 6-7 a.m. In addition, German sleep experts point out that 1 pm is an obvious peak of sleep during the day, when a nap can also enhance the activity of immune cells in the body and play a certain role in cancer prevention. 6.Eating with onion and garlic It is understood that Cang Shan County in Shandong is one of the few counties with the lowest mortality rate of stomach cancer north of the Yangtze River, where each person eats 6 kg of garlic per year. This is related to the fact that allicin has antioxidant effects and can reduce the level of carcinogens nitrite in the human body. Studies have shown that people who eat more garlic have a 60 percent lower risk of stomach cancer. Allicin is only produced when garlic is crushed and fully combined with oxygen, and it is very unstable and loses its effect quickly when exposed to heat. Therefore, it is best to crush garlic and eat it raw, or chop it into garlic paste and put it in cold dishes. 7. Chew and swallow slowly Investigation proves that people who always swallow their food in one gulp have a higher chance of stomach cancer. Chewing more can reduce the burden of food on the digestive tract and lower the risk of gastrointestinal cancer. In addition, the University of Georgia experiment found that saliva has a strong “anti-toxic” effect, which can make the toxicity of aflatoxin, the main culprit of liver cancer, significantly reduced within 30 seconds. Therefore, according to the calculation of chewing once a second, it is better to chew 30 times a mouthful of rice in order to have cancer prevention effect. 8.Eat less sugar The favorite “food” of cancer cells is sugar. In the Japanese book “How to prevent and treat cancer”, it is pointed out that when blood flows through tumors, about 57% of the blood sugar will be consumed by cancer cells and become the nutrients that nourish them. The American Journal of Clinical Nutrition states that the risk of pancreatic cancer is higher with as few as two sweet drinks a day than with those who do not. Therefore, it is best to eat less or no sugary foods. It is generally accepted internationally that the daily intake of sugar should be within 50 grams per person.