1. Staple food: refined rice flour and its products (bread, cakes, biscuits, etc. ), all kinds of starch, sorghum, potatoes, sweet potatoes, macaroni and so on.
2. Milk eggs: milk and its products (fresh milk, cheese, yogurt, milk powder, etc. ), eggs and their products (eggs, duck eggs, quail eggs, etc. ).
3. Vegetables: green vegetables (chicken feathers, cabbage, cabbage, lettuce, spinach, celery, leek, leek, tomato, eggplant), melons (cucumber, wax gourd, pumpkin, bitter gourd, zucchini, etc. ), radish (white radish, carrot, etc. ), potatoes, taro, sweet potatoes, etc.
4. Fruit: all kinds of dried and fresh fruits, fruit juice, jam, etc.
5. Drinks: light tea, carbonated drinks (soda, soda, cola, etc. ), mineral water, coffee, malt extract, chocolate, jelly and so on.
6. Others: all kinds of snacks and condiments made of oil, sugar (although it does not contain purine, it should be properly selected), honey, pig blood, chicken blood, duck blood, jellyfish, animal glue or agar.
Low-purine food refers to food with purine content less than 25mg per 100g food.
Classification criteria:
For the distinction between acidic and alkaline foods, you may have a wrong idea, that is, tasting with your tongue can judge whether it is sour or astringent by taste; Or take litmus test paper, according to the physical and chemical characteristics, see its color change, blue becomes alkaline, red becomes acidic; Or according to the experience of daily diet, we think that lemons, oranges, apples and other foods are sour, so they belong to acidic foods. In short, opinions vary.
Food basically contains five elements-protein, fat, carbohydrates, vitamins and minerals. Everyone knows that protein and vitamins are very important. Although minerals are only trace, they are also indispensable elements to maintain health. Among the minerals necessary for human body, eight are closely related to the acidity and alkalinity of food: potassium, sodium, calcium, magnesium, iron, phosphorus, chlorine and sulfur. The first five elements are dissolved in water to form an alkaline solution. Most vegetables, fruits, kelp, beans and dairy products contain more elements such as calcium, potassium, sodium and magnesium.
From the point of view of nutrition, after food is ingested into human body, it will undergo digestion, absorption and various complex metabolic reactions, forming thousands of products. These products are acidic and alkaline, and many of them are neutral. The pH of human body fluids (mainly the pH of blood) is the result of the comprehensive balance of the above metabolites, not just determined by several minerals in food. If you want to determine whether a food is acidic or alkaline, you must go through scientific testing.