If the stevia is tasting bad, you may be using too much. If you over do it, it gets an extreamly bitter taste.

Stevia is great, and can be used by people who have candidia. I use the kind with the good type of fiber added. My only complaint is that it doesn't always disolve and your left with a nasty chunk. The liquid I have to be extreamly careful not to use to much of and getting to the nasty tasting stage.