National Institute of Health Report done by Judith R. Lubbers, Sudha Chauan, and Joseph R. Bianchine back in 1982 with double blind clinical trials proved that ingesting chlorine dioxide had no ill effects on the human body.  Look it up yourself here:  http://www.ncbi.nlm.nih.gov/ pmc/articles/PMC1569027/pdf/ envhper00463-0059.pdf