You're thinking of Diet Coke. Aspartame absolutely does have a taste, but it has also been studied an absolutely insane amount over literal decades and nobody can ever actually pin down a negative health effect from it.
Better the devil you know. Everyone knows that sugar is bad for you. But aspartame is sold as being good for you because it’s zero calories. Must be good, right? It’s Diet Coke! A diabetic friend said his doctor told him regular coke was better for him. It causes migraines (source: me). I have heard many doctors say it is worse than real sugar. Yes, we don’t understand it yet. But we are pretty sure it’s bad, that’s why it’s the devil.
