I think Stevia is the one I heard recommended on a candida forum that I belong to. This forum is very aware of health related issues, so it must be pretty good stuff. Certainly if it was toxic, it wouldn't be near that forum. Everything on there is information for buildling up the immunity and healing.

It's hard to get off sugar when you start off and it can take ages to get the cravings under control. If you really require something sweet to help you through this, stevia seems to be a good option.