Coke Zero is a sugar- and calorie-free soft drink sweetened predominantly with the artificial sweeteners aspartame and acesulfame potassium. This combination ensures a taste profile close to original Coca-Cola while offering a healthier alternative to sugar. Aspartame and Ace-K are FDA-approved, widely tested sweeteners with an excellent safety record, although some consumers may experience sensitivity. Coke Zero differs from Diet Coke by using the dual sweetener blend for a smoother flavor. As the sugar-free beverage market grows, these sweeteners remain key in delivering great-tasting, low-calorie drinks.