Erythritol is a naturally occurring zero-calorie sugar alcohol used as a low-glycemic sweetener in health-conscious and diabetic-friendly food and beverage formulations. Sourced through fermentation (typically from glucose via yeast or fungi), Erythritol offers ~70% sweetness of sucrose but with negligible caloric contribution (0.2 kcal/g) and no impact on blood glucose or insulin levels. It is non-hygroscopic, heat stable, and commonly used in sugar-free, keto, and dental-friendly formulations.