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MEDICAL
Metabolic
Vitamin B12 Deficiency

In October 2005, my serum vitamin B12 was reported to be 100 pmol/L. For serum vitamin B12, the ranges were quoted by the laboratory as:

  • <100 pmol/L deficient
  • 100 to 130 pmol/L borderline
  • >130 pmol/L normal.

I began the investigation of my vitamin B12 deficiency, which eventually led to my investigation of the tests for diagnosis of vitamin B12 and folate deficiencies.

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