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Tag: TIBC

September 22, 2026

Rheumatoid Arthritis and Persistent Fatigue: When CBC, Iron, B12, and Thyroid Tests Matter

How clinicians use blood counts, iron studies, vitamin B12, and selected thyroid tests to investigate fatigue that persists despite RA treatment.

Persistent fatigue in rheumatoid arthritis deserves its own evaluation. Inflammation may contribute, but anemia, iron deficiency, thyroid disease, sleep problems, medication effects, and other conditions can overlap. The most useful blood tests are the ones […]

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August 26, 2026

Iron Studies Explained: Ferritin, Serum Iron, TIBC, Transferrin, and Transferrin Saturation

A marker-by-marker guide to stored iron, circulating iron, binding capacity, iron availability, and the limits of any single result.

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 […]

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August 26, 2026

Iron Deficiency Anemia: Why Ferritin, Transferrin Saturation, CBC, and the Source of Iron Loss Must Be Read Together

How to confirm both iron deficiency and anemia, identify blood loss or malabsorption, and document recovery of hemoglobin and iron stores.

Iron deficiency anemia is not simply a low hemoglobin result, a low serum iron result, or a reason to take an iron supplement indefinitely. The diagnosis contains two connected findings: iron deficiency and anemia. The […]

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August 11, 2026

CBC and Anemia Blood Tests: Hemoglobin, MCV, Iron, Ferritin, Vitamin B12, and Folate

How CBC components, iron studies, ferritin, reticulocytes, vitamin B12, folate, white cells, and platelets work together to clarify anemia and blood-cell patterns.

CBC and anemia blood tests evaluate the number, size, and distribution of blood cells and help organize common anemia and blood-cell patterns.1 A complete blood count with differential and platelets measures red cells, hemoglobin, hematocrit, […]

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