This can be divided into alkaline food, acidic food and neutral food according to the number of elements contained in the food itself. Acidic food, animal food except milk. Alkaline food is a plant food other than whole grains. Neutral cooking oil, salt, coffee, tea, etc. (1) acidic foods foods containing more minerals such as sulfur, phosphorus and chlorine, the final metabolites in the body are acidic, such as animal foods such as meat, eggs and fish, beans and cereals. Proper collocation of alkaline food helps to maintain acid-base balance in the body. (2) Alkaline foods Foods containing more minerals such as potassium, sodium, calcium and magnesium are often alkaline in the body, such as vegetables, fruits, milk, soybeans and fungus foods. Proper collocation of alkaline food helps to maintain acid-base balance in the body. When it comes to alkaline food, we have to mention the glacier water in Pamirs, which is of great help to people. What are the alkaline foods: strongly acidic foods: beef, pork, chicken, tuna, oysters, flounder, cheese, rice, wheat, bread, wine, peanuts, walnuts, sausages, sugar, biscuits, white sugar, beer, etc. Weakly acidic foods: ham, eggs, lobster, octopus, squid, buckwheat, cream, peas, eels, river fish, chocolate, onions, hollow powder, fried tofu, etc. Strongly alkaline food: tea, cabbage, persimmon, cucumber, carrot, spinach, cabbage, lettuce, taro, kelp, citrus, fig, watermelon, grape, raisin, strawberry, millet, coffee, wine, etc. Weakly alkaline foods: tofu, peas, soybeans, mung beans, bamboo shoots, potatoes, mushrooms, rape, pumpkin, tofu, celery, sweet potato, lotus root, onion, eggplant, pumpkin, radish, milk, apples, pears, bananas, cherries, etc. There are also some foods that are mistaken for acidic foods because they taste sour, such as wild vegetables, tomatoes, vinegar and so on. In fact, these things are typical alkaline foods. Some dried fruits (coconuts, apricots and chestnuts) produce alkaline ash, while others (such as peanuts and walnuts) produce acidic ash. Corn and lentils are acidic foods. Alkaline foods are mainly divided into: 1. Vegetables and fruits; Second, seaweed; Third, nuts; 4. Cereals and beans that have sprouted. Avoid or reduce the intake of the following acidic foods: 1. Starch; Second, animal food; Third, sweets; 4. Refined processed food (such as white bread); 5. Fried food or cream; 6. Beans (such as peanuts) alkaline foods such as beans (soybeans, kidney beans, red beans), vegetables (radishes, rape, tomatoes), seaweed (kelp, seaweed, green algae), fruits (oranges, grasses, lemons, bananas, grapes) and fresh juice without sugar. Note: sugary or fried foods are alkaline. Moderately alkaline foods: soybeans, tomatoes, bananas, strawberries, protein, prunes, lemons, spinach, etc. Weak alkaline food: red beans, apples, Chinese cabbage, tofu, cabbage, rape, pears, potatoes. Alkaline food recommendation 1. Apples. Fruit is the most digestible food and the best cleanser in the body. Among fruits, apples are called the best alkaline food, which can improve the acidic constitution to maintain the acid-base balance of the human body. Eating apples can quickly neutralize excessive acidic substances in the body, thus enhancing physical strength and disease resistance. In addition to neutralizing the acid-base balance, research and analysis also show that eating apples often is beneficial to lose weight, because apples will increase satiety, and eating before meals can reduce food intake and achieve the purpose of losing weight. 2. Vegetables: Almost all vegetables, especially green leafy vegetables, are alkaline foods. They are rich in vitamins and minerals and can supplement the body with nutrition. A large amount of cellulose in vegetables can also improve the digestive function of the human body and maintain the health of the stomach. Therefore, it is very suitable to use them to neutralize a large number of acidic foods in the body, such as meat and starch, to help food digest and excrete in time. Alkaline foods contain more metal elements such as sodium, potassium, calcium and magnesium. It should be understood that all sour fruits and bean products are alkaline foods, not acidic foods, and alkaline foods are considered to have cosmetic effects. Tofu, milk, celery, potatoes, bamboo shoots, mushrooms, carrots, kelp, mung beans, bananas, watermelons, strawberries and most fruits and vegetables are alkaline. The "acidity and alkalinity" of food will affect the bodybuilding of posture and skin. The identified weakly alkaline foods are: bean curd, pea, soybean, mung bean, rape, celery, sweet potato, lotus root, onion, eggplant, pumpkin, cucumber, mushroom, radish, milk and so on. Alkaline foods include spinach, cabbage, cabbage, lettuce, carrots, bamboo shoots, potatoes, kelp, oranges, watermelons, grapes, bananas, strawberries, millet, persimmons, coffee and wine. There are also some foods that are mistaken for acidic foods because they taste sour, such as wild vegetables, tomatoes, vinegar and so on. In fact, these things are typical alkaline foods. Eat more alkaline food. It is found that eating more alkaline food can keep the blood weakly alkaline, reduce the acidic substances such as lactic acid and urea in the blood, and prevent them from depositing on the tube wall, thus softening blood vessels. Therefore, some people call alkaline food "a cleaner for blood and blood vessels". The pH mentioned here is not the nature of the food itself, but the nature of the elements left in the body after digestion and absorption. Common acidic elements are nitrogen, carbon and sulfur. Common alkaline elements are potassium, sodium, calcium, magnesium and so on. Some foods taste sour, such as tomatoes and oranges, but they are all strongly alkaline foods, because the last element after their metabolism in the body is potassium. What is acidic or alkaline food? The so-called acidic food or alkaline food does not refer to the food with sour or salty taste, but refers to the food that produces dominant cations or anions after digestion, absorption and metabolism. In other words, a certain food, such as potassium, sodium, calcium, magnesium and other cations produced after metabolism, is an alkaline food; However, foods that produce anions such as phosphorus, chlorine and sulfur after metabolism are acidic foods. Lemon, citrus and carambola taste sour, but after metabolism, organic acids become water and carbon dioxide, and the latter is exhaled through the lungs, and the remaining cations are dominant and still belong to alkaline food; Similarly, although meat, fish, eggs and rice flour are not sour, they produce more negative ions after metabolism and still belong to acidic foods. Therefore, it is impossible to distinguish acidic food from alkaline food in taste.