Stevia, also known as Stevia rebaudiana, is a perennial herb native to South America. The leaves of the plant are used as a natural sweetener. Stevia is a non-caloric sweetener that is derived from the leaves of the Stevia plant. It is up to 300 times sweeter than sugar but does not affect blood glucose levels. It has been traditionally used as a natural sweetener for people with diabetes or for those who are trying to reduce their sugar intake. It is also believed to have antioxidant properties and may help to protect cells from damage.