1) Regular consumption can prevent cancer: a medium-sized orange can provide people with vitamin C for one day and improve their ability to resist bacterial invasion. Oranges can scavenge free radicals harmful to health and inhibit the growth of tumor cells. Among all fruits, citrus contains the highest antioxidant substances, including more than 60 flavonoids and 17 carotenoids. Flavonoids have anti-inflammatory, blood vessel strengthening and blood coagulation inhibiting effects. Carotenoids have a strong antioxidant effect. These ingredients make oranges inhibit the occurrence of various cancers. (2) The content of vitamin C in oranges is very high, and it has always been a favorite fruit of many people. But for women, eating more oranges has an unexpected benefit, which is to reduce the incidence of gallstones. It is because estrogen can make cholesterol accumulate more in bile, leading to high cholesterol concentration and the formation of stones. Oranges will play an obvious role in reducing the occurrence of gallstones. Because vitamin C in oranges can inhibit the conversion of cholesterol into bile acids in the liver, so that the concentration of cholesterol in bile is reduced, and the chance of their aggregation to form gallstones is correspondingly reduced. In addition, pectin contained in orange peel can also promote food to pass through gastrointestinal tract, so that cholesterol can be excreted with feces more quickly, thus reducing the absorption of cholesterol. People with gallstones can have a good therapeutic effect besides eating oranges and soaking in water. (3) Oranges, also known as "yellow fruits" and "golden rings", can be divided into sour and sweet. After a full meal, drinking a glass of lime juice can relieve greasy food, eliminate food accumulation and have a wonderful effect of quenching thirst and sobering up. Its pulp is moderately sweet and sour, and its aroma is rich. Oranges contain vitamins A, B, C, D, citric acid, malic acid, pectin and other ingredients. Vitamins P and C can enhance the toughness of capillaries. Pectin can help lipid and cholesterol excrete as soon as possible and reduce the absorption of exogenous cholesterol, so it has the function of lowering blood lipid. Oranges are sour and cool, and have the medicinal effects of promoting qi circulation and resolving phlegm, invigorating spleen and warming stomach, helping digestion and stimulating appetite. In developed countries, the pursuit of natural food, without adding any water, pay attention to the original flavor, and often make oranges into juice, which is an essential first-class drink for every meal. Orange peel, also known as yellow peel, contains a lot of carotene besides the ingredients in the pulp, which can be used as a flavoring agent for strengthening the stomach and fragrance. Orange peel also contains a certain amount of orange peel oil, which is effective for chronic bronchitis. (4) pay attention. It is recommended not to eat too much at a time, but to eat often. Chinese medicine believes that some people are not suitable for eating oranges. For example, people with dry mouth and throat and less red tongue coating. Traditional Chinese medicine believes that this is caused by insufficient liver yin, and eating too many oranges is more likely to hurt liver qi and cause deficiency heat.