Originally published May 10, 2026. Updated August 26, 2026. Iron status is not one laboratory number. A serum iron result can change with meals, supplements, time of day, illness, and ordinary biological variation. Ferritin estimates […]
Originally published May 10, 2026. Updated August 26, 2026. Iron status is not one laboratory number. A serum iron result can change with meals, supplements, time of day, illness, and ordinary biological variation. Ferritin estimates […]
A laboratory result usually answers a straightforward question: How much of a substance is present? A biomarker ratio asks a second question: How does that result relate to another part of the same biological system? […]
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