Oral EDTA is poorly absorbed by the gut lining. A big part of it can be recovered in feces. I believe it will target the colon. You may use it during enema sections too. Yes, it is antifungal. I posted the same article you referred the link. I have used EDTA myself several times.
This is a fragment of a paper published by Dr. Elmer Cranton, MD specialized in chelation therapies ;
EDTA is very poorly absorbed by mouth—only five percent—although even that small amount does remove lead from the body. Although it is theoretically possible to slowly accumulate an effective dose of EDTA by mouth...