Frequently Asked Questions about Diet Coke and Sugar Does Diet Coke contain any sugar? No, Diet Coke does not contain any sugar. It is a sugar-free beverage. Learn More What sweeteners are used in Diet Coke? Diet Coke is sweetened with artificial sweeteners, such as aspartame, acesulfame potassium (Ace-K), and sucralose. Learn More Does Diet Coke have any calories? Diet Coke is a calorie-free beverage. It has zero calories. Learn More Is Diet Coke suitable for people with diabetes? Diet Coke can be consumed by people with diabetes as it is sugar-free and has zero carbohydrates. However, it’s always advisable…