A, lettuce and lettuce is a kind of vegetable lettuce and lettuce because of its refreshing taste and rich in nutrients and by people's favorite. But in the strict sense, lettuce and lettuce is not a vegetable, lettuce is not lettuce. Because what we usually call lettuce is actually lettuce, a kind of lettuce that mainly eats leaves, and lettuce is also a kind of lettuce that mainly eats stems, therefore, lettuce is a general term for this kind of vegetable, rather than a different name for the same vegetable. Lettuce and lettuce have different shapes and different ways of eating; lettuce mainly eats leaves, while lettuce mainly eats stems. What to pay attention to when eating lettuce and romaine lettuce 1. stomach to avoid lettuce salty, don't put too much salt when cooking, otherwise it will make the nutrients leakage and affect its flavor. 2. lettuce is not suitable for cooking or storage in copper utensils, which may destroy the ascorbic acid contained in it and reduce the nutrients. 3. when eating lettuce, try to avoid long time consumption of high oil and high temperature, so as to avoid fire and discomfort. 4. lettuce and romaine lettuce have different shapes and different ways of eating, mainly eat the leaves, while eat the stems mainly eat the lettuce. In addition, the folic acid in romaine lettuce can be easily destroyed, so avoid cooking at high temperatures if you are using it as a folic acid supplement.4. Lettuce and honey should not be eaten together as honey is rich in wax and has a laxative effect. Lettuce is essentially cold, if the two are consumed together, it is not good for the stomach and can easily cause discomfort. Third, what is the role of lettuce 1. lettuce is high in potassium and low sodium vegetables, lettuce containing potassium and sodium, potassium is an essential element to maintain human life, so we often eat fresh lettuce, which is very effective for the body. 2. lettuce is rich in potassium ions, sodium content of 27 times, is conducive to the body of the balance of water and electrolytes and to promote urination. 4. intestinal laxative lettuce contains a large amount of plant cellulose, can promote Peristalsis of the intestinal wall, help the digestive tract, and help defecation, which is of great benefit to the human body. Lettuce and lettuce can also increase fluoride and blood, it is rich in fluoride, can promote bone growth, lettuce contains organic compounds rich in iron, can be absorbed by the human body, very beneficial to the human body, which contains iron in the combination of organic acids and enzymes can be easily absorbed by the human body, the white material from the lettuce stems have a soothing effect on the human body, and has the function of regulating the nervous system.