PTree - You are right about the special bulking agent being used for candida. The Bulking Agent III is similar to Bulking Agent II - which is what they have had for years. Also probable the one you tried a few years back.
The III formula is suppose to be improved, as it contains one ingrediant in that Bulking Agent II does not. But for the life of me, I don't remember what it is at this moment. I do know that it is suppose to replace the good bacteria. I have not had any problems with it and don't mind the flavor at all.