Ah! I'm not thinking of Diatomaceous Earth which does make it through the entire tract. Although, I wonder how effective DE is once the candida population gets down to a certain point.
But, there are other effective natural antifungals that go the distance.
For instance, did you know that colostrum is not only an effective gut healer, it also keeps candida in check? I didn't know that until a few days ago but look: