The main ingredient in stevia dry leaves for stevia glycoside, not only high sweetness, low calorie, also has certain pharmacological effects. Stevia sugar are the treatment of diabetes, blood sugar control, lower blood pressure, anti-tumor, resisting diarrhea, enhance immunity, promote metabolism, and so on, to control obesity, regulating stomach acid, restore nerve fatigue has a good lutein eye complex effect, also has significant curative effect for heart disease, pediatric dental caries and so on, the most important is that it can eliminate the side effects of sucrose. The United Nations food and agriculture organization (fao), the world health organization jecfa in June 2008 the 69th session of the report clearly shows that the normal stevia sugar daily intake below 4 mg/kg body weight when no side effects to the human body. South America, southeast Asia and the far east, stevia glycoside is widely used in food and medicine field. China's ministry of health in 1985 approved the stevia glycoside for unlimited use of natural sweeteners, and in 1990 approved the stevia sugar sweeteners materials for medical use.
As a drug and diet has been widely used. Since 1990, when the Chinese approval for stevia can be used as pharmaceutical use sweetener accessories. Stevia indican derivatives were also have high blood pressure, blood sugar, anti-tumor, improve diarrhea and enhance human immunity and other clinical curative effect. Stevia is widely used for taste masking agent, used to correct certain drugs peculiar smell, taste, tablets, pills, capsules and other accessories. Because the stevia glycosides is a kind of sweeteners, sugar to eat into his mouth will saw palmetto extract not produce acid under the action of the bacteria in the mouth, so use it to make candy food, not due to produce acid corrosion teeth, can be used to prevent dental caries in children. Because the stevia glycosides resistant to acid and alkali, and within the scope of the pH4-10, heated to 100 ℃, its chemical structure will not change, will not produce microbial needed glucose, belongs to the material that is not of fermentation, often used in food preservation and drug mouldproof. Stevia glycosides in the human body little is metabolic, after the food won't produce too much heat, reason often used to make sweet food of obese patients, children eat sweet chrysanthemum beverage or stevia candies, etc., can avoid obesity to weight gain, prevent childhood obesity.
Stevia, alias sweet chrysanthemum "flora of Beijing". Perennial herbs, 100-150 cm tall. Stems erect, base half lignification, about 1 cm thick, many branched. Leaves opposite; Sessile; Leaf blade obovate to broadly lanceolate, 5 -- 10 cm, 1.5 3.5 cm wide, apex obtuse, base cuneate, upper leaf margin coarsely serrate. Small capitulum, 3-5 mm in diameter, in branch end arranged in the umbrella shape, per inflorescence 5 tubiform floret, involucre cylinder, about 6 mm long; Bracts 5-6, almost isometric back pubescent; Tubular florets, white, apex 5-lobed. Achene, long lines hammer, 2.5 3 mm long, dark brown; Pappus multiple, 4-5 mm long, white. Flowering fruiting 8-10 months. Medicinal best green coffee bean extract properties: this product more broken or shrivel, grass green, full of blade is shown after flattening obovate to broadly lanceolate, 4.5 9.5 cm long, 1.5 3.5 cm wide; Apex obtuse, base cuneate; In the upper margin coarsely serrate, lower margin entire; Veins 3, central vein, two sides all have pilose; Under the short petioles, leaf blade often extended to petiole at base; Heavy leather qualitative and qualitative fragile brittle. Micro, very sweet taste.
Perennial herbs, 1-1.3 m tall. Shallow root system, by the early to take root, and a time to take root. Root distribution depth of 20-40 centimeters, biennial root the following germination ability of several to dozens of stem, for fenugreek saponins plant breeding. Hypertrophy of root tip, article 50 to 60, upright stems, round. Annual seedling of single stem, perennial later. Upper base pin lignification, tender, densely napo, leaves simple, opposite, or the upper stem, a handful of trilobites wheels, short blade, obovate or lanceolate, shallow serrated edge, both sides is napo, green or thick green, Ye Maisan, high sweetness. Blade has a similar mold shape white hairs, is the normal secretory fluids, see more at gathering on rainy days.
Capitulum is small, bisexual flower, involucre tubular, total bracts 5-6 layer, edge length; Flat receptacle, bald net; Upper corolla base shallow purple or white, white. Achene linear, slightly compressed, brown, pappus. Seed kernels per 0.4 g, no resting period, easy to lose germination ability, life no more than a year. In late July to early August for budding period. Flowering in September 7 -, fruiting 9 to 11 months.
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