2. The nutrition of Zizyphus jujuba is mainly reflected in its composition. It not only contains trace elements such as potassium, sodium, iron, zinc, phosphorus and selenium like other fruits; More importantly, fresh jujube contains a lot of vitamin C, the content of which is 2-3 times that of jujube and 20-30 times that of citrus, and its utilization rate in human body can reach 86.3%, making it the best among all fruits.