The content of potassium in spinach is high, and there is 3 1 1mg potassium in 100g spinach. Potassium is one of the essential elements for human body. Potassium ion cooperates with other ions to regulate the ion balance in the body, regulating the regular rhythm of the heart and blood vessels, and also regulating muscle contraction. Potassium ion is also an anti-aging ion in the body, because it plays an important role in the regulation of cardiovascular and cerebrovascular diseases, and sodium is 85.2mg. In addition, spinach is rich in minerals such as calcium, magnesium, phosphorus and iron.

Although spinach is rich in iron, it is a vegetable with more tannic acid, oxalic acid and phytic acid, which greatly hinders the absorption of iron. It belongs to non-heme iron, and its absorption rate is only 5~ 15%. Therefore, if you want to supplement iron and blood, it is best not to use spinach to adjust. The best way to supplement iron and blood is animal food, such as animal liver, animal blood and red lean meat, in which iron belongs to heme. In addition, it is best not to eat too much spinach. Because of the high content of oxalic acid and dietary fiber, it may cause indigestion and may also inhibit the absorption of other nutrients. Excessive intake of spinach may also increase the risk of kidney calculi, because calcium oxalate is insoluble and rarely excreted, and long-term accumulation may lead to calcium oxalate stones. When spinach is cooked, it is best to boil water and remove more oxalic acid, which will be more conducive to eating.