Hollow cabbage, scientific name of the cabbage, also known as cabbage, tongcai, rattan, tongcai. Hollow cabbage is a dark green vegetable common in summer, rich in nutrients, rich in dietary fiber, vitamins, minerals and phytochemicals; The taste is crisp and delicious, and it can be cold mixed, stir-fried, and soup, so it is deeply loved by the people.
Benefits of eating hollow cabbage often:
1. Moisturize the intestines and relieve constipation. Hollow cabbage contains a large number of cellulose and hemicellulose, gum pulp, pectin, can promote intestinal peristalsis, promote digestion, but also increase satiety, delay the rate of gastric emptying, slow down the rise of blood sugar after meals, and have certain benefits for preventing obesity and three higher chronic diseases. People with poor stools can eat hollow cabbage appropriately to improve the problem of difficulty defecating.
2. Beauty and beauty, bacteriostatic and detoxification. Hollow cabbage is rich in vitamin C and carotene, which is conducive to promoting antioxidants in the body's cells and scavenging free radicals; Hollow cabbage contains chlorophyll, which can inhibit the sulfides produced during metabolism and reduce the odors such as bad breath and sweat odor produced by the body's metabolism; In addition, the content of vitamin B2 and folic acid is also rich; Hollow cabbage is rich in lignin, which can enhance the phagocytic ability of macrophages and can also be anti-inflammatory and sterile. Modern medicine has also found that hollow cabbage juice has an inhibitory effect on bacteria such as Staphylococcus aureus and streptococcus.
3. Potassium supplement and other minerals. Hollow cabbage is rich in minerals such as potassium, calcium, and magnesium. When sweating a lot in the summer, it is easy to lead to potassium deficiency, potassium deficiency will lead to limb weakness, lack of energy, lack of appetite, etc., therefore, in the summer, eat more foods with high potassium. Eating more potassium-rich foods can also promote sodium excretion, which is also good for preventing high blood pressure.
The content of oxalic acid in hollow cabbage is high, oxalic acid is combined with calcium, phosphorus, etc. to form insoluble salts, which affects the absorption of minerals such as calcium and phosphorus, and blanching the hollow cabbage before cooking can remove most of the oxalic acid. Hollow cabbage has more sodium than other leafy greens, and when frying hollow cabbage, put less salt.
The "disadvantages" of hollow cabbage:
1. Some places call hollow cabbage a cramp dish. Clinically, there are indeed cases of body cramps from eating hollow cabbage. This is mainly because the oxalic acid and tannic acid in hollow cabbage react with the calcium in the body to form a precipitate of calcium oxalate, which affects the absorption of calcium. However, this situation occurs mostly in patients with severe calcium deficiency, and people who do not lack calcium will not have cramps after eating hollow cabbage. In the process of cooking hollow cabbage, most of the oxalic acid, tannic acid can be gradually decomposed with the process of blanching, frying, frying, and scalding, and the oxalic acid content that enters the human body after eating is relatively low, and there is no need to worry about cramping when eating more hollow cabbage.
2. Some people call hollow cabbage "poisonous vegetables" and think that "hollow cabbage is most likely to adsorb heavy metals and pesticide residues", which is actually a lack of basis. If you are worried about the high residue of pesticides on hollow cabbage, you can use vegetable detergent to soak more, or you can only eat the stem (there are relatively more residues in the leaves and roots).
Not suitable for people who eat more hollow cabbage:
1. Patients with weak gastrointestinal function and diarrhea are not suitable for eating hollow cabbage. Hollow cabbage contains more dietary fiber, promotes intestinal peristalsis, gastrointestinal function is weak people eat more may have stomach pain, diarrhea patients will aggravate diarrhea.
2. People with low blood pressure and easy numbness or cramps in their hands and feet should not eat more. Although hollow cabbage is rich in calcium, it is also high in oxalic acid and tannic acid, which will cause free calcium ions in the human body to combine with oxalic acid and tannic acid, affecting the absorption of calcium.
3. Hollow cabbage is rich in potassium, renal insufficiency, hyperkalemia patients should follow the doctor's advice to eat in moderation.