Hollow cabbage, also known as "cramp vegetables" in some places, it is said to eat too much will lead to a lack of calcium and make people cramps? But from a nutritional point of view, this claim is not strong science. Although the high content of oxalic acid in cabbage will affect the body's absorption of calcium, and the blood calcium ions are too little will cause cramps. However, calcium ions in the blood are very stable, and with slight fluctuations, the calcium in the bone will be replenished, and it is rare to have too few calcium ions. Therefore, the inference that eating hollow beets can cause cramps is not valid. Moreover, in addition to cabbage, such as spinach, pomegranate and other foods are also rich in oxalic acid, but not known as "cramp vegetables" or "cramp fruit", which is a bit "biased". In fact, the main causes of muscle cramps are excessive fatigue, poor posture or position, insufficient blood supply, cold stimuli. Pregnant women can be induced by a low level of transient hormones and cramps. From this point of view, the hollow cabbage and cramps really do not have much to do, hard to be deducted on the "cramps vegetable" name, is really a bit wrong. (Attachment) the nutritional role of cabbage: cabbage contains a variety of nutrients, protein content than the same weight of tomatoes 4 times higher than the calcium content than tomatoes more than 12 times higher, and contains more carotene. Cabbage is rich in crude fiber, with the promotion of gastrointestinal peristalsis, laxative detoxification effect. Cabbage is alkaline food, after eating can reduce the acidity of the intestinal tract, prevent intestinal flora imbalance, beneficial to cancer prevention. Cabbage is cool in nature, and the juice has an inhibitory effect on Staphylococcus aureus and streptococcus.