Tag: Lab Testing
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Your Vitamin D Blood Test Measures the Precursor, Not the Hormone
Her vitamin D came back low normal and nothing happened. The number on that report is a precursor, bent by the assay, by cholesterol and by whose blood built the range.
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Methylmalonic Acid Test: When a Normal B12 Is Not Normal
A serum B12 counts vitamin that never reaches your cells. What a methylmalonic acid test measures, what fools it, and why marker pairs read B12 status better.