Stevia rebaudiana is a genus of plants native to South America. Its common names, sweet leaf and sugar leaf suggest its tastiness. A highly refined form of stevia called rebaudioside A (marketed as Rebiana) is approved by the U.S. Food and Drug Administration (FDA) as a food additive. Stevia leaf is obtained from Stevia rebaudiana that originated in South America. This specific plant is popularly mentioned as sugar leaf and sweet leaf for its distinctively sweet flavor. High refined form of this leaf is rebaudioside A that has certification of U.S Food and Drug Administration ( FDA) to be used as suitable food additive.