The form in which stevia is primarily used as a sweetener in Japan is that of a white powdered extract. In white powder form, Stevia is approximately 200 to 300 times sweeter than sugar (by weight). This Stevia White Powder is an extract of the sweet glycosides (natural sweetening agents) in the stevia leaf. Not all stevia extract powders are the same. The taste, sweetness and cost of the various white stevia powders will likely depend on their degree of refinement and the quality of the stevia plant used. You may find that some powders have more of an after taste. Since extracted stevia powder is so intensely sweet, we recommend that it be used by the pinch (or drop if diluted in water). Once mixed, this solution should be stored in the refrigerator.