* Herbal Supplement * Zero Calories * Non-Bitter NuNaturals uses our premium grade Stevia extract from which the unpleasant aftertastes have been removed. NuNaturals NuStevia products use only the highest grades of Stevia extracts that we select for purity and superior flavor. NuNaturals uses plant-based natural flavors that help to make our NuStevia products the best-tasting ones available. NuStevia brand Stevia is a plant extract.