Kumquat peel is better than kumquat with the smallest pulp, which is a typical representative of kumquat genus. Although the pulp is small, you can eat it with skin. The nutritional value of kumquat peel is amazing. 80% of vitamin C is stored in the peel, which can not only detoxify the liver, but also protect the eyes and immune system. The nutritional value is among the best among citrus fruits. Kumquat peel is thick and smooth, and there are many oil cells (that is, pressing will produce aromatic gas). In addition to eating fresh with skin, it is often used to make snacks such as candied fruit, drinks and fruit wine. The more sour the lemon, the more nutritious it is. Lemon fruit is oval and yellow, and the peel is not easy to peel off. It contains nicotinic acid and rich organic acids, and tastes extremely sour. Citric acid juice has a strong bactericidal effect, and people often use it to eliminate odor. Adding some lemons to seafood or wine can make the taste more delicious. Lemons can be divided into yellow, orange and green because of different places of origin. Relatively speaking, bright colors may have higher maturity and higher acidity, so they can be selected emphatically. The famous orange varieties for moistening lung and resolving phlegm are Shatangju and Nanfengtangju, which are about the size of table tennis. It is oblate, mostly orange-yellow or orange-red, loose, easy to peel, delicious, with tumor-like protuberance at the top and depression at the umbilical end. It is worth mentioning that citrus (so called in Fujian and other places, "Ponkan" in Zhejiang and Guangdong) also belongs to oranges, not oranges. Oranges are rich in citric acid, vitamins and essential elements such as calcium, phosphorus, magnesium and sodium. Has the effects of promoting fluid production and relieving cough, and can be used for treating gastrointestinal dryness and heat; Has the effects of regulating stomach and promoting diuresis, and can be used for treating abdominal discomfort and dysuria. It has the function of moistening lung and resolving phlegm, and is suitable for cough due to lung heat. Oranges are peaceful and can be eaten properly even by patients. Usually, it is best to choose a fruit with a medium size, straight fruit shape, smooth surface and fine oil cells. Common varieties of hypolipidemic sweet orange are common sweet orange, navel orange, blood orange and so on. Among them, there is a navel at the top of the navel orange fruit, that is, there is an immature small fruit embedded in the top of the fruit, which is seedless, crisp and tender, and has a strong sweet and slightly sour taste. Orange, also known as Huangguo, has a spherical peel, which is not easy to peel off, and the juice tastes sweet. It contains a lot of sugar, a certain amount of citric acid and rich vitamin C, and has high nutritional value. Studies have shown that drinking three glasses of orange juice a day can reduce the cholesterol content in the body. Oranges taste slightly different from place to place. The acid content of oranges in Huguang area is low, while that in the Yangtze River area is slightly higher. Most of the oranges we are familiar with, such as Wenzhou mandarin, banana mandarin, red orange and so on. , is a hybrid of orange and orange. Peel is harder than oranges, but easier than oranges that need to be cut with a knife. Citrus juice is rich in sugar, organic acids, minerals and other nutrients. Grapefruit is famous for its coldness, such as sweet pomelo, Shatian pomelo and Yuhuan pomelo. Grapefruit is sweet and sour, cool and moist, rich in nutrition and of high medicinal value. Grapefruit is big, generally more than 2 kg. It is rich in carotene, B vitamins, vitamin C and various minerals. Grapefruit is cold, so eating grapefruit has a certain effect of removing fire. Guangxi Shatian pomelo is pear-shaped, with total acid content of 0.3-0.6g and vitamin C 100ml or more. The pulp is crisp and refreshing, white or fleshy, sweet and of good quality. The medium-sized ones are better, and the fruits will be stored for about half a month after harvest, which is more delicious. Intimate reminder to choose fresh oranges. First, smell the natural fragrance. Secondly, touch it with your hand to see if the peel is sunken and the pulp is firm. It is best to choose fruits with rich fragrance and firm flesh. Finally, you can choose one with pedicels or leaves. Eating about a catty of citrus fruit every day is the best for your health.