2, the role is different: because Chinese cabbage contains more fiber, it can not only promote intestinal peristalsis, help digestion, prevent dry stool, lettuce can protect the liver, promote bile formation, prevent cholestasis, and effectively prevent gallstones and cholecystitis. In addition, lettuce can remove the garbage in the blood, which has the functions of blood disinfection and diuresis, and can also remove intestinal endotoxin and prevent constipation.
3, rich in nutritional value: Chinese cabbage is flat, slightly cold and sweet. Every 100g of Chinese cabbage contains 4 1mg of calcium, 37mg of phosphorus, 0.5mg of iron, crude fiber, carotene, a small amount of protein, fat, sugar and vitamins. Lettuce is rich in nutrients, including antioxidants, beta carotene and vitamin B, vitamin C, vitamin E and dietary fiber. It also contains calcium, phosphorus, potassium, selenium, magnesium and a small amount of minerals such as copper, iron and zinc.
Extended data:
Precautions for eating lettuce:
1, lettuce is shredded by hand, which will be more brittle than a knife.
2. Lettuce is extremely sensitive to ethylene, so it should be stored away from apples, pears and bananas to avoid brown spots.
3. No matter whether the lettuce is fried or boiled, the time should not be too long, so that the crisp taste of lettuce can be maintained without destroying its nutrients.
4. Cooked lettuce should not be eaten overnight. Green leafy vegetables contain more nitrate. After storage for a period of time, it will become nitrite due to the action of enzymes and bacteria. Nitrite is a harmful substance that causes gastric cancer.
5, lettuce is likely to have residues of pesticides and fertilizers, and must be washed before eating raw. You can soak lettuce in clear water for 20-30 minutes, and then rinse it repeatedly with clear water. Because alkaloids in rice washing water have a good dissolving effect on pesticides and other harmful substances, lettuce can also be soaked in rice washing water for 10 minute, then the immersion liquid is poured out and washed repeatedly with flowing clear water.
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