And vitamin C by itself is supposed to mobilize mercury. Waiora's theory is that Vit C enhances the absorbtion of the NCD but absorption of NCD is a very complicated issue as this is the only product so far which uses clay that can actually enter into systemic circulation.
What could be done in your case NOT too skew the results would be to take a very high dosage Vit C for your first test(w/o NCD) and then take a much lower dosage the second time around ( w/ NCD). Hope that helps,