The ingredients in Diet Coke include carbonated water, caramel color, aspartame, phosphoric acid, potassium benzoate, natural flavors, citric acid and caffeine. Coke Zero has an almost identical ...

Then came its sugar-free counterparts, Diet Coke and Coke Zero. But then we began to question their ingredients, too. So we wanted to answer the question, Is your daily Diet Coke really that bad?