NET-ON.ORG

Stevia: Benefits, Uses, Effects?

1
26 views

Stevia: Benefits, Uses, Effects?
A sweetener that helps in diabetes and inflammation

HISTORY

The first news of the existence of Stevia rebaudiana dates back to its use by the indigenous Guarani who called caa-ehe (sweet grass) and used it to cover the bitter taste dell'Ilex paraguayensis with which he prepared an exciting brew called "Mate ".
Initially, it was described by the Paraguayan botanist Moises Santiago Bertoni (1857-1929), Asuncion, such as Eupatorium rebaudianum, it was exactly then classified in the genus Stevia, by William Botting Hemsley (1843-1924). The species name, "rebaudiana," you have been given in honor of the chemical Rebaudi who first studied the chemical characteristics of the substances contained in the plant sweeteners.
Stevia (Stevia rebaudiana Bertoni fam. Asteraceae) is a perennial plant, very resistant to frost, usually grown as a semi-perennial in extremely cold places, with hermaphrodite flowers very small, numerous and whitish, collected in inflorescence.
It looks like a seedling unpretentious, vaguely resembling a basil plant, green leaves.

GROWING

It is extensively cultivated and consumed in Thailand, Israel and China, and in general in all of South America.
In Italy, the best time to transplant falls in the month of April for the mild temperatures and frequent rains which provide a good rooting of seedlings and uniform development.
The absorption of nutrients occurs in the 30 days following the transplant and only for nitrogen also near flowering. In regards to the plant irrigation is necessary to ensure the right conditions of moisture after transplantation and before the collection of leaves. Where the climate allows a second crop irrigation is essential post-harvest to favor the emission of sprouts. During the dry season you have to provide a number of irrigations.
Have been described more than 150 species of Stevia rebaudiana but it is the only important with sweetening properties.
 

stevioside
DRUGS AND ACTIVE

The leaves contain a complex set of diterpene glycosides. These substances are characterized by the presence in their structure of three molecules of glucose.
The active ingredients are stevioside, rebaudioside A, rebaudioside C, dulcoside A. Of the four sweeteners (stevioside, rebaudioside A, rebaudioside C, dulcoside A), which are found in higher concentrations in the leaves, stevioside (3-10 % of the dry weight of the leaves) and rebaudioside a (1-3%) have physical properties and sensory well characterized, respectively, with a sweetness of 110-270 and 180-400 times higher than sucrose.
The principles sweeteners are in all parts of the plant but are no longer available and concentrated in the leaves, which when dried (dehydrated), have a sweetening power (effect of the mixture of the two components sweeteners) from 150 to 250 times the common sugar.
Important international journals such as "Journal of Agricultural" and "Food Chemistry", mentioning the Stevia rebaudiana plant as 200-300 times sweeter than sugar.
In particular, according to some studies, stevioside is between 110 and 270 times sweeter than sucrose, rebaudioside A between 150 and 320 times, and rebaudioside C between 40 and 60 times.

AVAILABILITY AND FORMS Sweeteners

Depending on the mode of use and the form used may be more or less sweet: stevia leaves can be eaten fresh, dried leaves powder (up to 30 times sweeter than sugar) but also infused in powder form dehydrated extract that comes as a white powder or as a liquid concentrate or extract (can get up to 300 times sweeter than sugar) or tablets contained in a handy dispenser portable.
 

rebaudioside
ASSETS AND PROPERTY

Stevioside, no-calorie sweetener plant has anti-tumor activity, anti-inflammatory, immunomodulatory and anti-diabetic.
Stevia has been shown in experimental studies, although not to injure the teeth and possessing an antihypertensive effect measured (Phytotherapy Research) in people with moderate hypertension type where proved safe and tolerable.
Stevia is used in medicine today, especially for those suffering from blood sugar, for skin care (effective against acne, dehydration, wrinkles and skin blemishes) and the treatment of 'hypertension.
Given its properties, stevia may also be effective to cope with diabetes, obesity and other similar disorders associated with consumption of sugars.
The leaves are used in Asia as a sweetener in a 'wide variety of foods and beverages.
In South America has been used for centuries as a sweetener but also as a medicinal plant. In Brazil, it is used as a remedy in the folk medicine for diabetes.
Stevia also has shown anti-inflammatory, antifungal and protective of the pancreas.
If taken in much higher doses than those used for sweetening, may cause hypotension, or low blood sugar.
 

USE

Contrary to sugar the active ingredients of Stevia have no nutritional value (zero calories), are relatively stable over time, at high temperatures up to 200 º C and do not ferment, so perfectly preserve their characteristics in food preparations pre-cooked or baked goods or hot drinks, unlike other synthetic sweeteners such as aspartame, which undergoes degradation.
The leaves can be chewed to reduce the desire for sweet, without introducing calories. Putting in your mouth a little fresh leaf Stevia, after a while, there is a very strong and pleasant to the palate sweet feeling; what remains in the end is a hint of licorice. A leaf is enough to sweeten a cup of coffee.
But even they do not have the map ... a few drops of concentrated or one tablet taken 20 minutes before meals to make "anti-hunger" as it gives a feeling of satiety with stevia on the balcony of the house there is no need of sugar or dark nor light, nor of bags synthetic sweetener.

TOXICITY AND MARKETING

For a long time there have been no data on the properties of Stevia but in the last years there have been further testing, both in Europe and in the U.S., where stevia has definitely exceeded all evidence of toxicity has been under (and considering that the dose of a daily consumption is about 10mg per day, was tested at doses of grams).
On 10 April 2003 the European Parliament passed a resolution calling for to review the rules of use of sweeteners such as aspartame and stevia. In the same measure is strongly limits the maximum amount of sweeteners in soft drinks. FAO and WHO have established a "maximum daily dose" of 2 mg / kg body weight of steviol.
The real launch of Stevia in the U.S. takes place in 2008, following FDA approval, a decision that represents a real breakthrough for the category of sweeteners, encouraging growth and attracting consumers of white sugar.
Coca-Cola ® in Japan uses as a sweetener for Coca Cola Light ® (Diet Coke ®).
From 14 April 2010, the European Union allows the use of this sweetener as a food additive. Switzerland also admits the trade and use.
Thanks to a special exemption, stevia arrived in France in 2010 and also in this case the same result in terms of the expansion of trade and consumer.

The commercialization of Stevia and its use in all European countries was finally admitted by the EU as of 2 December 2011 (EU Regulation No. 1131/2011 of 11 November 2011).
In Italy, since that date, has also triggered the go-ahead to its marketing.
 
Inflorescences (Wikipedia)
STUDIES
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
University
Recently, a major study carried out in Thailand has been able to demonstrate that stevioside, the active ingredient of Stevia, it would be able to modulate an important transcription factor - NF-kB - involved with its anti-inflammatory and immunomodulatory effects also in inflammation and in the carcinogenesis.
Stevioside content in Stevia could act with such a regulatory mechanism of injury even muscled, allowing a rapid recovery from a hamstring injury with a suitable dietary administration.

Article Wiki Closed - Stevia: Benefits, Uses, Effects?
asked Jul 4, 2014 by Lancomega Level (10,245 points)
...