1, fried food

Repeated heating of oil at high temperature will produce harmful substances. For example, unsaturated fatty acids will produce polymers-dimers and trimers after high temperature treatment. In addition, most fried foods contain a high concentration of acrylamide, which is what we usually call "propane poison", which is a carcinogen. After entering the human body, it will destroy vitamins, change the nature of protein, "attack" the human immune system and become the "number one killer" of cardiovascular diseases. The acrylamide content in French fries is particularly high, which requires special attention.

2. Pickled food

Salted food is easy to produce harmful substances such as nitrite, because a lot of salt will be added during processing. Especially in the process of pickling vegetables, if the salt content is less than 15%, and the temperature is high and the pickling time is short, the nitrate contained in vegetables is likely to be reduced to nitrite by microorganisms.

Scientific research shows that the content of nitrite in food will increase after 1 hour until it reaches its peak in about 2 weeks, and this state will last at least 2 ~ 3 weeks. After nitrite enters the human body, it will first stimulate the gastrointestinal system, affect the mucosal tissue, and cause inflammation and even ulcers; It will also increase blood pressure, increase the burden on the kidneys and even increase the risk of cancer. Therefore, eating pickled food often has a great impact on human health.

3. Meat processed food

Most processed meat foods also contain some nitrite. In addition, ham products contain a lot of sodium, which will lead to excessive salt intake, obvious blood pressure fluctuation and even permanent damage to renal function.

Step 4: cookies

Cookies contain a lot of sugar and trans fatty acids. If you eat it regularly, you will feel full easily, and it will also affect your body's intake of other nutritious foods, resulting in malnutrition such as calcium deficiency, potassium deficiency and vitamin deficiency. Teenagers often eat too much biscuit food, which is easy to be obese and not conducive to healthy development. In addition, the study found that eating too much sweets can easily lead to high insulin secretion and endocrine disorders, as well as diabetes, cardiovascular and cerebrovascular diseases, obesity, rickets, myopia, dental caries and other diseases.

Trans fatty acids can reduce the high-density cholesterol content in human blood and increase blood viscosity, thus increasing the risk of arteriosclerosis and diabetes. Therefore, although biscuits taste sweet, they should be eaten in moderation. When buying biscuits or other similar foods, if the words "shortening", "vegetable cream", "vegetable cream" and "hydrogenated vegetable oil" are marked on the packaging ingredient list, it means that trans fatty acids are contained, so be careful when buying.

5, carbonated drinks

Carbonated drinks have a unique taste, especially suitable for relieving summer heat and thirst in summer, so they often make people want to stop. As we all know, many substances in carbonated drinks are the "culprits" of human osteoporosis, diabetes and gastrointestinal dysfunction. Children often drink it, which is easy to get dental caries. Excessive drinking by adults is not good for health.

6. Barbecue food

When meat gives off an attractive smell in the oven, have you ever thought that behind these smells, protein is changing and vitamins are being destroyed? These changes not only reduce the nutritional value of meat, but also produce carcinogens. Some barbecues are burnt outside and tender inside. In fact, the tender meat is not cooked yet, and it may contain a variety of bacteria and microorganisms. Coupled with spicy ingredients such as pepper, pepper and cumin powder, it will have a great impact on the human digestive system, which may damage the digestive tract mucosa and induce cancer.

7. candy food

Candied foods contain a lot of sodium cyclamate, preservatives and nitrite, which is easy to form ammonium nitrite after entering the human body. In addition, too much essence in candied food is also a "sharp weapon" to damage the human liver. Too much salt will lead to high blood pressure and increase the burden on the kidneys. Therefore, although candied fruit is delicious, it should be eaten with caution.

People's Daily Online-Which foods should be eaten less in order to protect intestinal health?