Introduction Stevia rebaudiana is a plant species in the genus Stevia of the family Asteraceae. It is commonly known as candyleaf, sweetleaf or sugarleaf.Stevia is widely grown for its leaves, from which extracts can be manufactured as sweetener products known generically as stevia and sold under various trade names.The chemical compounds that produce its sweetness are various steviol glycosides mainly Stevioside and Rebaudioside, which have 100–300 times the sweetness of sugar. Stevia leaves contain 9.1% Stevioside and 3.8% Rebaudiosidlle -A.Stevia rebaudiana has been used over centuries by the Guaraní people of Brazil and Paraguay, to sweeten the local tea, as