You probably have a very sensitive/better developed sense of taste. I knew a girl like that: every artificial sweetener got bitter aftertaste according to her.

You probably have a very sensitive/better developed sense of taste. I knew a girl like that: every artificial sweetener got bitter aftertaste according to her. Glycerin didn't but that kinda defeats the point. I think most people can't taste what to do though. For me for example coke zero has a very pleasant sweet taste and I prefer it to the original one.