Erythritol is a natural, low-calorie sugar alcohol widely used as a sweetener in diet and zero-sugar beverages. While Diet Coke mainly uses artificial sweeteners such as aspartame, erythritol appears in many other diet sodas and health-focused drinks. Offering benefits such as low calories, blood sugar stability, and dental health advantages, erythritol is seen as a promising sugar substitute. However, emerging research indicating possible cardiovascular risks and digestive issues calls for cautious and informed consumption. Understanding erythritol's properties, uses, and health implications can help consumers make smarter dietary choices aligned with their wellness goals.