Introduction
Mainly divided into spherical doughnut leaf wrapped heart lettuce and leaf wrinkled cream lettuce (flower leaf lettuce). Globe leaf lettuce leaves curled inside, according to its color is divided into green leaf, white leaf, purple leaf and red leaf lettuce. Green leaf lettuce is fibrous, white leaf lettuce has thin leaves and fine quality, and purple leaf and red leaf lettuce have bright color and tender texture.
Semi-ball lettuce: Italian year-round moss, cold-resistant cream lettuce, etc.; loose-leaf lettuce has the United States large fast-growing, lettuce king, glass lettuce, purple leaf lettuce, fragrant oil lettuce, etc.. Bitter leaf lettuce is rarely cultivated. Hot summer areas, fall cultivation should be selected heat-resistant, moss-resistant varieties.
Lettuce originated in the Mediterranean coast of Europe, lettuce in China in the past cultivation is not much, more planted in the south. With the reform and opening up, after frequent foreign exchanges, in the past 10 years in some big cities and coastal cities, lettuce planting area gradually more and more, followed by many cities in the Mainland, also introduced test planting, welcomed by consumers. Recently, lettuce has become the fast developing green leafy lettuce in our country.
Properties
Lettuce taste sweet, cool nature, has the effect of clearing heat and refreshing, clearing the liver and gallbladder, stomach.
Lettuce is a cool alkaline food, specifically a strong alkaline food.
The general population can eat, frequent urination, stomach cold people should eat less.
Eating precautions
Lettuce has hardly been found to have contraindications, but after the identification of nutrition experts found that the advantages of lettuce is certainly a lot, it seems that all people are suitable for consumption, non-stimulating, non-polluting, a usual but light vegetables, the modern nutritional eating more and more careful, by the traditional cooked vegetables, gradually eaten raw more nutritious to be accepted, vegetable Salad, cake points, etc. are added to lettuce to eat, not only can be a good role in the relief of fatigue, but also to promote digestion and intestinal fluency. Consumption of lettuce need to pay attention to some of the problems, eaten raw to pay attention to pesticide and fertilizer residues, in addition to the following issues.
Nutritional value
Because of its stems and leaves contain lettuce, so the taste is slightly bitter, with analgesic hypnotic, lower cholesterol, assist in the treatment of neurasthenia and other efficacy; lettuce contains mannitol and other active ingredients, diuretic and promote the role of blood circulation. Lettuce contains an "interferon inducer", can stimulate the body's normal cell production of interferon, thus producing an "antiviral protein" inhibit the virus. Lettuce contains low calorie, lettuce is the main method of consumption is raw food, for the Western-style vegetable salad of the main dish.
Effective role:
To clear heat and tranquilize the mind, clear the liver and gallbladder, stomach effect. Suitable for stomach diseases, vitamin C deficiency; suitable for obesity, weight loss; suitable for high cholesterol, neurasthenia, liver and gallbladder disease patients; raw food, regular food can be conducive to women to maintain a slim figure.
The above is an in-depth analysis of lettuce, we are not on the lettuce of this usual vegetables have a more in-depth understanding of it, the future of life should be a reasonable diet, eat more green vegetables in order to let us grow up healthy.