Stevia
 
	
 
Stevia is a 
genus of about 240 
species of 
herbs and 
shrubs in the sunflower family (
Asteraceae), native to 
subtropical and 
tropical regions from western 
North America to 
South America. The species 
Stevia rebaudiana, commonly known as 
sweetleaf, 
sweet leaf, 
sugarleaf, or simply 
stevia, is widely grown for its sweet leaves. As a sweetener and 
sugar substitute, stevia's taste has a slower onset and longer duration than that of 
sugar, although some of its extracts may have a bitter or 
licorice-like 
aftertaste at high concentrations.
With its 
steviol glycoside extracts having up to 300 times the 
sweetness of sugar, stevia has garnered attention with the rise in demand for 
low-carbohydrate, low-sugar food alternatives. Because stevia has a negligible effect on 
blood glucose, it is attractive as a natural sweetener to people on 
carbohydrate-controlled diets.
The availability of stevia varies from country to country. In a few countries, it has been available as a sweetener for decades or centuries; for example, stevia is widely used as a sweetener in 
Japan where it has been available for decades. In some countries health concerns and 
political controversies have limited its availability; for example, the United States banned stevia in the early 1990s unless labeled as a 
dietary supplement,
[1][2] but in 2008 approved 
rebaudioside A extract as a food additive. Over the years, the number of countries in which stevia is available as a sweetener has been increasing.
 
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