Stevia rebaudiana Bertoni of the Asteraceae family originates from Brazil and Paraguay. It sparked interest among the nutritionists owing to its two compounds: rebaudioside A and stevioside. The latter glycosides have strong sweetening properties that are up to 300 times stronger than those of sucrose. The plant is also characterized by a high antioxidant activity resulting, among other things, from a high content of poly-phenols. Extracts of the stevia leaves demonstrate beneficial health effects. It is connected with the specific activity of this plant that comprises its following properties: anti-inflammatory, antihyperglycaemic, anti-hypertensive, immune system processes modelling ability, anti-cariogenic, and antiviral.