NuNaturals NuStevia Reb99 is a pure extract powder of the Stevia plant. 99% of the Rebaudioside-A (Reb-A) in the Stevia leaves is extracted for this product. Reb-A is considered to be the sweetest element of the Stevia leaf, with the most pleasant taste. Reb99 is a high grade Stevia extract. NuStevia Reb99 has a very clean taste profile with no unpleasant aftertaste. It is excellent for mixing up large batches of beverages or for baking recipes. NuNaturals NuStevia Reb99 has one ingredient: Stevia Extract. It contains absolutely no calories or carbohydrates.