Useful properties of lettuce
Salad precocious refers to annual plants widely cultivated in many countries. More than a thousand varieties of vegetable crops that originate from crossing different varieties of lettuce. They can be divided into four main types: iceberg, leaf, asparagus and romaine.
Despite the fact that the homeland salad is unknown, there are many historical sources indicate that this culture has been known and widely used in ancient times by the Romans, the Greeks and the Egyptians, and in European countries began to cultivate a salad from the sixteenth century.
Due to its beneficial properties of lettuce are considered the best addition to the meat, potatoes and fish dishes. They contain large amounts of folic acid, helps regulate metabolism, and also affects the nervous and hematopoietic systems. They are also an excellent source of vitamin A and C. In addition, lettuce have a weak diuretic, antitussive, expectorant and sedative properties.
The lettuce leaves contains large amounts of trace elements necessary for the body, including zinc and copper, manganese and cobalt, titanium and molybdenum, iodine, boron. Also the lettuce comprises:
- Calcium - 15%;
- Potassium - 38%;
- Phosphorus - up to 9%;
- Iron and Magnesium - up to 5%;
- Silicon - up to 8%.
Appreciated salad and included in its chemical composition and sulfur deficiency in the body which can lead to the development of various nerve diseases. Together with the silicon sulfur contributes to the normalization of hair growth, and also affects the condition of the skin and tendons.
Contained in the leaves of lettuce sulfates, nitrate and muriate of potassium useful for the pancreas, liver, kidney and blood-vascular system.
Magnesium contained in lettuce leaves, affects the brain, muscle tissue and nerve fibers. The organic salts of magnesium construction promotes cell lung tissues and maintain normal blood circulation.
Scientists have observed the use of lettuce for children and for the elderly. In addition, this plant is recommended for those who lead a sedentary lifestyle and diabetes mellitus.
Calorie lettuce is low and varies from 10 to 27 calories, depending on the variety. Through this lettuce it is recommended to use in the various diets.
Application of lettuce
Lettuce have a beneficial effect on fat metabolism and helps reduce cholesterol levels in the blood, reducing the risk of diseases such as hypertension, atherosclerosis and obesity. Lettuce improve digestion, as well as a calming effect on the nervous system, because they have a slight soporific effect.
In addition, marked by the use of lettuce for nursing mothers - leaves and water infusion of the crushed seeds of the plant help to increase milk production.
Infusion of fresh shredded lettuce in folk medicine is prescribed for chronic gastritis, increased emotional excitability, insomnia, hypertension, scurvy, heart disease and liver disease.
Some varieties of lettuce such as watercress, rich in iodine and their leaves can be used as a lotion for the treatment of thyroid cancer. Regular consumption of watercress leaves due to its high content of beta-carotene and lutein reduces the chances of developing eye diseases such as cataracts and age-related macular degeneration.
Useful properties of lettuce used in cosmetics to prepare various masks that contribute to the rejuvenation of facial skin cells. Also, when the sun burns the lesion is recommended to wipe the juice of fresh lettuce.
Despite the low calorie lettuce and beneficial properties of this plant, there are some contraindications to its use in food. Thus, any type of lettuce have contraindicated in large quantities in the:
- Gastric ulcer and duodenal ulcer;
- Exacerbation of chronic duodenitis;
- Urolithiasis (with calcium oxalate, uric acid and phosphate stones);
- Acute intestinal diseases with severe digestive disorders.