From the Han Dynasty, we began to introduce "lettuce" for eating. Later, the efficacy of lettuce was further proved. It is recorded in "A Thousand Daughters of Shi Zhi" that lettuce "benefits five internal organs and invigorates vitality". In this way, lettuce is not only a green vegetable eaten by ordinary people, but also a beneficial medicine that can double physical strength and prolong spirit, so it is loved by many people.

Lettuce is not only a vegetable, but also a medicinal tea. What is its medicinal value? Lettuce is sweet and cool, and has the effects of clearing away heat and toxic materials, promoting diuresis and relaxing bowels, promoting lactation, regulating qi and resolving phlegm.

Lettuce can be used for the adjuvant treatment of red fever in urine, hematuria, hypogalactia or hypogalactia, and cough with thick phlegm. Lettuce is a low-calorie vegetable with high content of vitamins and minerals and low content of protein and sugar. It is suitable for friends with hyperlipidemia, obesity and hypertension. Lettuce can be cold or fried.

The main component of lettuce is water, which is low in carbohydrates and energy, and is more suitable for people who lose weight. The content of potassium ion in lettuce is relatively high, which is 6 times of its own sodium content.

From the point of view of nutrition, the nutritional value of lettuce leaves is no less than that of lettuce stems. Take intuitive dietary fiber as an example. The dietary fiber content of lettuce stems is obviously less than that of lettuce leaves, and most people will choose to remove the fiber that affects the taste when eating lettuce stems, thus further reducing the dietary fiber content of lettuce stems.

Many people don't eat lettuce stems, mainly because the taste is not good, but we can choose to fry them, which can improve the taste. Some surveys have found that the prevalence of hypertension in the north is higher than that in the south. Later, after careful comparison, it was found that this was related to the heavy taste of the northern diet. Northerners generally eat salty food, and the intake of potassium ions is also insufficient.

The water in lettuce can also help the human body to improve metabolism and increase energy consumption. The water in lettuce can also help the human body to improve metabolism and increase energy consumption. The dietary fiber contained in lettuce can increase satiety and reduce the body's absorption of fat and sugar. People who want to lose weight actually want to get rid of fat, and the order of human energy consumption is sugar, followed by fat, and finally protein. Lettuce itself is low in sugar and fat, so it is more conducive to weight control.

Lettuce contains more water and dietary fiber. If there is more water, it will help to soften the stool. The dietary fiber inside can promote the peristalsis of gastrointestinal tract, which is more conducive to the discharge of stool, so it can prevent or relieve constipation.

Lettuce contains an aromatic hydrocarbon hydroxylated fat, which has a certain decomposition effect on nitrosamines. Lettuce contains an aromatic hydrocarbon hydroxylated fat, which has a certain decomposition effect on nitrosamines. You should know that nitrosamine is a carcinogen, and its amount is reduced.

Naturally, it can reduce the risk of cancer. In addition, dietary fiber in lettuce can also delay or inhibit the absorption of carcinogens by human body. Dietary fiber can promote gastrointestinal peristalsis and reduce the retention time of feces in the body, so it can play a role in reducing the risk of cancer.

Eating lettuce often is good for your health, but you can't eat too much. From the perspective of traditional Chinese medicine, lettuce belongs to cold nature and is not suitable for people with spleen and stomach deficiency and cold. Eating more lettuce will stimulate the optic nerve to a certain extent and may induce eye diseases.