Many people already know that barbecue food is one of the main causes of cancer, but in fact, high salt diet is more closely related to the occurrence of gastric cancer. Most people consume more than 6g of salt per day, and the high osmolality in salt will destroy the gastric mucosa, which will easily induce stomach cancer in the long run. Frequent consumption of the following foods are also prone to stomach cancer: 1. pickled vegetables and salted foods, including salted stinky radish, meat cured products, salted fish, pickled vegetables and pickled seafood, which contain a large amount of nitrate and nitrite, increasing the risk of stomach cancer; 2. smoked and fried foods, especially fried and smoked foods of fish and meat, because the frying and deep-frying process produces heterocyclic amines, which are prone to cancer; 3. moldy foods; 4. high Food with high salt content (the total salt intake per person should not exceed 6g per day); 5. Beer and whiskey may contain nitrosamines, which may lead to the occurrence of stomach cancer. Currently, gastric cancer is developing at a younger age, probably because young people love to eat smoked, high-salt and spicy food, and love to smoke and drink. All of these can disrupt the normal function of the gastrointestinal tract and seriously damage the gastric mucosa, leading to gastritis, gastric ulcer and other diseases, which will increase the chance of cancer. Some people feel that they have “indigestion”, especially in summer, and think it is very normal. In fact, if they have been like this for a long time, they should not buy medicine on their own, but should go for gastroscopy to check whether their stomach is healthy. The early detection rate in China is less than 10%, and early cases can be completely cured by surgery, while the middle and late stages are “uncertain”. If you have symptoms such as pain in the upper abdomen, loss of appetite or a feeling of fullness, frequent belching, weight loss, anemia, swelling, difficulty swallowing, vomiting blood, and black tarry stools, you should seek early medical attention. Gastroscopy is the gold standard for the diagnosis of gastric cancer. East Asian countries have a high incidence of gastric cancer, and in Japan, people after the age of 40 will have gastroscopy at least once a year, and the government has long included the gastroscopy program in the relevant regulations, as a social welfare to promote and provide free to the public, so the detection rate of early gastric cancer in Japan is very high. In Korea, gastroscopy was also introduced as a universal screening program in 2002. Screening for gastric cancer including H. pylori screening, barium meal imaging or endoscopy in high-risk areas and high-risk populations is essential to control the incidence of gastric cancer and reduce the mortality rate of gastric cancer. People who have chronic atrophic gastritis, gastric ulcer, gastric polyps and pernicious anemia, after most of the gastric resection and family history of gastric cancer are all high-risk groups and should have regular gastroscopy, preferably once a year. Meanwhile, eating more of these foods can keep away from stomach cancer: 1. fresh vegetables and fruits; 2. ensure water hygiene; eat more foods containing vitamin C and E, such as citrus and lemon, which can block the synthesis of nitroso compounds by supplementing vitamin C, vitamin E and selenium; 3. onion and garlic.