Oranges belong to alkaline food, because the content of mineral elements such as potassium, calcium and phosphorus in oranges is relatively high, which will enter the human body after eating, and the metabolites after gastrointestinal digestion are alkaline, so from the perspective of nutrition, oranges belong to alkaline food.

Many people easily mistake oranges for acidic food. In fact, acidic food or alkaline food is not judged by taste, but by the popular theory of acid-base constitution. In fact, foods that are digested and eventually form acidic free radicals such as nitrogen, carbon, sulfur, chlorine and salt are called acidic foods.

For example: cattle, sheep, pigs, chickens, ducks, fish, grains and so on. These acidic foods usually refer to foods rich in protein, fat and sugar. Because they contain more sulfur, phosphorus and chlorine, it is easy to produce sulfuric acid, hydrochloric acid, phosphoric acid, lactic acid and other substances after metabolism in the human body.

Most fruits are alkaline foods, such as bananas, oranges, melons, strawberries, lemons, grapes, oranges and persimmons. Like some meat, fish, eggs, all starch and cereals, all sweets, seasonings, onions, garlic, some beans and nuts, all oil and cream, etc. Most of them are acidic foods. Because people's constitution is weakly alkaline and there are many acidic foods, eating more alkaline foods is good for the body and can maintain the acid-base balance of the body.