Spinach originated in Persia. More than two thousand years ago, Persians planted it as a vegetable. China's prosperous Tang Dynasty was an era of Zhenguan rule. In 647 AD, the King of Nepal made a special trip to take spinach as a tribute, climbed mountains and waded in water, not far from Wan Li, and sent it to Chang 'an, the capital of our country. Since then, a new member has been added to the vegetable map of China. After spinach settled in China, its advantages appeared. Soon, its high nutritional value stands out among vegetables, which is beyond the reach of other vegetables. Therefore, spinach has the reputation of "the king of vegetables".
Spring has arrived, and spinach is one of the vegetable varieties listed earlier. Spinach can be eaten all year round, but the quality of spinach in spring is the best Now is the best time to eat spinach. Most of the spinach planted in Northeast China is winter spinach, and its nutritional value is higher than other varieties listed in the same period. According to the calculation of nutrition experts, the vitamin C content of 100g spinach can meet the human body's need for vitamin C for 24 hours. Eating spinach regularly has a good effect on the secretion function of the stomach and pancreas. Spinach contains iron 1.6 ~ 2.9 mg, protein 2.4 g (1 kg spinach is equivalent to the protein content of two eggs), vitamin A 3 mg, b 1.06 mg, b 1.06 mg B2, C 31. Spinach is sweet and cool, which is beneficial to clean up the heat toxin in human stomach, nourish blood and stop bleeding, astringe yin and moisten dryness, and make people radiant. Foreign antioxidant experiments show that spinach is also one of the foods for beauty, beauty, skin care and effective prevention and treatment of constipation.
Spinach is rich in nutrition, which can especially meet children's demand for vegetables. It is an irreplaceable vegetable for children. People are used to eating "soup and cold salad". Most people stew tofu with spinach. It is worth noting that this way of eating violates scientific common sense. Spinach is called "the king of vegetables", and every 65,438+000g of spinach contains about 300mg of oxalic acid. Tofu contains more magnesium chloride and calcium sulfate. Insoluble calcium oxalate will be produced in the human body, which will not only fail to supplement calcium, but will cause calcium deficiency and loss. It is generally believed that spinach can supplement a lot of iron. In fact, the iron content in spinach is not high, and simply eating it can't play a role in enriching blood.
Spinach is cold and sweet, and has the functions of nourishing blood, moistening dryness and relaxing bowels. Modern medical research shows that every100g of spinach contains 500mg of potassium, which, together with mineral calcium, can lower blood pressure and promote blood circulation. Tongluo, it has a lot of dietary fiber, which can effectively prevent dry stool.
At the same time, spinach can also reduce the risk of retinal degeneration in the elderly. According to foreign researchers, this is the role of flavonoids in spinach, which can also effectively prevent and treat macular degeneration of eyes. Spinach is a popular food with good quality and low price. Deeply loved by urban and rural people. But how to eat is the most reasonable. I'm afraid some people don't know. The best way to eat now is as follows:
How to eat spinach is more reasonable and scientific, and what are its taboos! 1, no matter how you eat (boiling, frying, frying, soup), remember to blanch with boiling water before eating, and the time should not be too long. 1-2 minutes is enough. Too long will lead to the loss of vitamin C, so soak it in hot water for two or three minutes and take it out for later use. Doing so can remove most of the oxalic acid contained in spinach. After this part of oxalic acid is dissolved in water, spinach will not have astringency and other vitamins will not be destroyed. 2. In order to prevent the nutrients of spinach from being destroyed, cover the pot when cooking, try to avoid too much contact with air and heating for too long, and keep the vitamin C in spinach from being destroyed by oxidation to the maximum extent. At the same time, should it be served in bronze utensils and cooked with copper pots and shovels? Because bronzes, pots and shovels will accelerate the oxidation process of vitamins in spinach. 3, spinach should not be eaten with tofu, about 100 grams of spinach contains about 300 mg of oxalic acid. Tofu contains high content of protein, magnesium chloride and calcium sulfate. If it enters the human body at the same time as spinach, it will produce insoluble calcium oxalate, which will not only cause calcium loss, but also deposit into stones. So spinach and tofu had better not be eaten together. 4, spinach is good, but it should be moderate, not too much at a time, especially for patients with stones, because oxalic acid in spinach will aggravate the pathological changes of stones, especially for patients with urethral stones, they should be careful to eat, or not to eat, adults eat too much spinach, and will also cause hand and foot spasm due to calcium deficiency; Eating too much spinach can also cause the body to absorb less zinc. Zinc is an essential trace element for human body. Although the required amount is small, it has a great effect, especially for children, pregnant women and tuberculosis patients. Don't throw away the bare roots of spinach in vain. Rich in vitamin K, it is unique to spinach in leafy vegetables. People usually know that vitamin K is called "the hero of stopping bleeding", also called coagulation vitamin. Because it can promote blood coagulation, it is an indispensable good friend of human beings. If we humans are short of vitamin K, once an accidental wound occurs and necessary surgical treatment is carried out, the coagulation time will be prolonged, and the wound and incision will bleed without healing. Although the average adult will not be short of vitamin K, they should continue to supplement it.