Disappointed. Hair Analysis disproves foot pad theory.

I hate to say it, but I don`t think the foot pad theory works. I had a hair analysis (DDI) done a year ago
and after 6 weeks on the footpads (one on each foot) I did a follow up test having waited a month for
the hair to grow.
Well, the results are almost identical!!! Lead was the only thing to take a drop (from .49 to .18) which I
was happy about. But Mercury actually went up. (.52 to .67) both of which are btw within the lower part
of the range and considered safe.

I`d really love to hear the explanation........