Zero-Calorie Liquid Sweetener NOW BetterStevia Glycerite is alcohol-free and a zero-calorie, low glycemic, natural plant based sweetener that makes a perfectly healthy substitute for table sugar and artificial sweeteners. Unlike chemical sweeteners, NOW BetterStevia Glycerite contains natural plant Stevia extracts. NOW Foods takes special measures to preserve Stevia’s natural qualities in this unique, better-tasting stevia.