Coke Zero is sweetened with aspartame and phosphoric acid. It's just formulated differently to avoid the taste associated with Diet Coke, which some find unpleasant.
> Coca-Cola updated the recipe for Coca-Cola Zero Sugar in the US, quietly adding stevia to the existing blend of aspartame and acesulfame potassium (Ace-K) in late 2023/early 2024
Strange, Google says this:
> Coca-Cola updated the recipe for Coca-Cola Zero Sugar in the US, quietly adding stevia to the existing blend of aspartame and acesulfame potassium (Ace-K) in late 2023/early 2024
Did they change it back?