Stevia is a natural alternative to artificial sweeteners. It gets its sweetness from a family of molecules called "Stevioside". The members of this family of molecules that have a natural sweetness ranging from 60 to 350 times that of sucrose are not fermentable, indigestible, and therefore have almost zero calories.
innotaste offers the Rebaudioside A (60% as well as 98%, Food Grade), also known as Reb A and rebiana, which is a high-intensity sweetener derived from the stevia leaf. Both products are available in powder form and agglomerated.