Zero Calories Non GMO Project Verified Gluten-Free Vegetarian/Vegan Product Kosher NOW BetterStevia is a zero-calorie, low glycemic, natural sweetener that makes a perfectly healthy substitute for tablet sugar and artificial sweeteners. Unlike chemical sweeteners, NOW BetterStevia contains pure Stevia extract. NOW Foods takes special measures to preserve Stevia's natural qualities in this unique, pure, better-tasting Stevia.