Susie,
Do you have a doctor's interpretation of the result?
Looks like you are borderline for having Pyroluria. But with CFS so many of our test results are off.
Here is a speculative view... considering that the bloodflow in the kidneys is half of normal in CFS (per one study anyway), I wonder if the real corrected result would be about double what this test shows, which would be 21, and that would be full Pyroluria. But again with the lowered kidney bloodflow and poor detox in CFS you probably might need a reduced treatment dose as well.
--Kurt