Diet Coke uses aspartame, a zero-calorie artificial sweetener 200 times sweeter than sugar, to provide sweetness without calories. Approved globally and supported by extensive safety data, it offers a healthier soda option while fueling innovation and debate in the sweetener industry.

This comprehensive article explains the sweeteners contained in Diet Coke, focusing on aspartame as the main sugar substitute along with acesulfame potassium and sucralose. It explores their discovery, roles, safety evaluations, regional formulation differences, and comparison with similar products. The information helps consumers understand what sweeteners are in Diet Coke and make informed beverage choices based on health and preference.