Ka’a he’e is the Guaranì name for Stevia rebaudiana, a perennial plant native to the mountains of Paraguay, long grown high up in the northeast of the country, in the Cordillera del Amambay area. It was first classified by botanist Moises Bertoli, but has been used as a natural sweetener by the Guaranì people since pre-Hispanic times. It was also known for its curative properties, for which it was consumed mixed in small quantities with mate or in an infusion with other medicinal herbs.