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I took a Cyclic Citrul Peptide AB test. My results were 15.9 and it stated that the reference range was less than 3.1 U/ML, so my result indicated a positive.

Why is my test being reported as positive if it is less than 20?

Maybe a better question is why is this reference range different?

  1. Hi Bob, all test results should be interpreted by a doctor. Different labs use different techniques and reference ranges.

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