Acidic food refers to the digestion and absorption through the digestive tract, and then transformed into inorganic salts, whose metabolites are non-metallic ions, most of which are acidic. Protein, fat, carbohydrates and other nutrients, after a series of transformation processes in the body, the final can be acidic, so acidic food according to different food classification, there are mainly the following: 1, protein: protein food is mainly divided into two kinds, one is animal protein, the other is plant protein. Foods with high animal protein content mainly include lean meat, milk and dairy products, eggs, fish and shrimp, etc. Foods with high vegetable protein mainly include beans, mushrooms, etc.; 2, fat: fat will be converted into fatty acids under the action of enzymes in the body, common high-fat foods include nuts, fatty meat, fried foods, etc.; 3, carbohydrates: starchy foods are mainly cereals, including steamed buns, rice and other carbohydrates Higher food, as well as potatoes, sweet potatoes, yams and other tubers, sugary drinks, cola, Sprite, cookies, ice cream and other foods with high sugar content, also contain a lot of carbohydrates. Whether acidic or alkaline food, the impact on human health is very limited. Daily consumption should still pay attention to the nutritional balance of the diet structure and control caloric intake to maintain the normal functioning of the body.