Lettuce (W not Jù) is lettuce (W not? sǔn）。 Lettuce (scientific name: Lactuca sativa L.var.angustanairish.), also known as lettuce, belongs to the genus Lactuca in Compositae, which can form a variety of tender stems and is a biennial herb. Alias lettuce, lettuce shoots, green shoots and lettuce.
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1. What is the nutritional value of lettuce?
(1) Lettuce has a high potassium content, which is beneficial to promoting urination and reducing the pressure on atrium, and is extremely beneficial to patients with hypertension and heart disease. ?
(2) It contains a small amount of iodine, which has a great influence on people's basic metabolism, mental and physical development and even emotional adjustment. ?
(3) It is rich in fluorine and can participate in the growth of teeth and bones. In addition, some substance in lettuce can stimulate the optic nerve. Ancient books record that eating more lettuce makes people's eyes paste, and if they stop eating for a few days, they can recover on their own. Therefore, people with weak vision should not eat more, and people with eye diseases, especially night blindness, should also eat less.
2. Lettuce leaves are rich in calcium, carotene and vitamin C. Stinky lettuce can promote the secretion of gastric juice, digestive enzymes and bile, which is helpful for hepatitis B and C virus carriers and patients with chronic liver disease to increase their appetite. People with liver cirrhosis and anemia often eat lettuce, which can promote the secretion of organic acids and enzymes, increase the absorption of iron, help the rise and recovery of platelets, and prevent the deterioration of the disease.
3. Eat three bamboo shoots away from liver cancer
For patients with liver diseases such as hepatitis B and liver cirrhosis, lettuce, bamboo shoots and asparagus can be eaten frequently in three meals a day, because these three foods have obvious liver protection and cancer prevention effects, and have the effects of eliminating phlegm, diuresis and detoxification, and helping dirt to be discharged from feces.
4. Nutrients
Lettuce is rich in nutrients, especially in leaves. Every 5g of fresh lettuce leaves (Beijing area) contains 1g of protein, 2.5g of fat, 16.5g of carbohydrate, 19mg of calcium, 185mg of phosphorus, 5.5mg of iron, 1.7mg of carotene, B2.6 of vitamin B and 75mg of vitamin C, etc.
But the content in the stem is much lower. Every 5g of lettuce stem contains only 1.5g of protein, only .2g of fat, only 4.7g of carbohydrate, and the content of carotene and vitamin C is very small.
the edible part is 62%. Every 1g contains 59kJ of energy, 95.5g of water, 1g of protein, .1g of fat, .6g of dietary fiber, 2.2g of carbohydrate, 15μg of carotene, 25μg of retinol equivalent, .2mg of thiamine, .2mg of riboflavin and .5mg； of niacin. Vitamin C 4mg, vitamin E .19mg,
potassium 212mg, sodium 36.5mg, calcium 23mg, magnesium 19mg, iron .9mg, manganese .19mg, zinc .33mg, copper .7mg, phosphorus 48mg and selenium .54 μ g. The edible part of its leaves is 89%. Every 1g contains 75 kJ of energy and 13 mg of vitamin C, which is obviously higher than that of the stem. Therefore, in terms of nutrition, we should change the habit of eating lettuce stems instead of leaves.
Baidu Encyclopedia _ Lettuce (Compositae)
People's Daily Online-People's Daily Online Health and Hygiene Channel-Eating lettuce regularly has four advantages: relaxing bowels, promoting diuresis, resolving food stagnation and strengthening the body
People's Daily Online-People's Daily Online Health and Hygiene Channel-Eating lettuce, bamboo shoots and asparagus can help prevent liver cancer.