Is lettuce hair?
Nutrition experts say that lettuce is not a hair care product. Lettuce is sweet and bitter, which can promote digestion and increase appetite. For constipation patients, it has a good stomach-invigorating effect.
Efficacy and function of lettuce
1.
Lettuce tastes fresh and slightly bitter, which can stimulate the secretion of digestive enzymes and increase appetite. Its emulsion can enhance the secretion of gastric juice, digestive gland and bile, thus promoting the functions of various digestive organs, which is especially beneficial to patients with weakened digestive function, decreased acidity of digestive tract and constipation.
2. Diuretion and lactation
The potassium content of lettuce is much higher than that of sodium, which is beneficial to the balance of water and electrolyte in the body and promotes urination and milk secretion. It has a certain dietotherapy effect on patients with hypertension, edema and heart disease.
3. Keep fit and prevent cancer.
Lettuce contains a variety of vitamins and minerals, which can regulate the function of nervous system. Its organic matter is rich in iron that can be absorbed by human body, which is very beneficial to patients with iron deficiency anemia. The hot water extract of lettuce has a high inhibitory rate on some cancer cells, so it can be used to prevent cancer.
Relax the intestines
Lettuce contains a lot of plant cellulose, which can promote intestinal peristalsis, dredge digestive tract and help defecation, and can be used to treat various constipation.
Morphological characteristics of lettuce
According to the leaf shape of lettuce, it can be divided into pointed leaves and round leaves. According to the color of stems, each type has white bamboo shoots, green bamboo shoots and purple bamboo shoots.
Lettuce leaves are pointed, lanceolate, sharp, with small clusters, sparse internodes, smooth or slightly shriveled leaves, green or purple. The fleshy stem is rod-shaped, with thick bottom and thin top. Mature late, heat-resistant at seedling stage, and can be cultivated in autumn or winter. The main varieties are: willow leaf lettuce, Beijing purple leaf lettuce, Shaanxi pointed leaf white bamboo shoot, Chengdu pointed leaf, Chongqing Wannianzhuang, Shanghai pointed leaf, Nanjing white skin fragrant early planting and so on.
Round-leaf lettuce has long obovate leaves, slightly rounded top, many shriveled leaves, large leaf clusters, dense internodes, thick stems (thicker middle and lower parts, tapering ends), early maturity and strong cold and heat resistance, and is mostly cultivated as winter and spring lettuce. The main varieties of lettuce are: Beijing Carassius auratus, Chengdu Guasihong, Erbaipi, Erqingpi, Jinan White Lettuce, Shaanxi Round Leaf White Lettuce, Shanghai Small Round Leaf, Nanyixiang, Hubei Xiaogan Lettuce, Hunan Gong Hammer Lettuce, etc.