THE VITAMIN B12 AND FOLATE PATHOLOGY INVESTIGATION
THE INVESTIGATION OF ERRORS IN PATHOLOGY TESTS
FOR VITAMIN B12 AND FOLATE DEFICIENCY
BY MEANS OF MEDICAL EXPERIMENTS
THE SERUM VITAMIN B12 INVESTIGATION
THE SERUM B12 EXPERIMENT - B
Summary
Method
Observations
Results - Notes
Results - Assay Quality
Conclusions
Assay Quality

The Gribbles (now Healthscope Pathology) serum B12 result for day 35 was very significantly higher than for the other laboratories, indicating a serious problem with quality control of the immunoassay.

Having regard to the results of my investigation, set out in this web site, in my opinion, Gribbles (now Healthscope Pathology) serum B12 results cannot be relied on for the diagnosis or monitoring of vitamin B12 deficiency.

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