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Tareq Abadl Differences the 3 Common Iron Tests
Nov 28, 2025, 06:02

Tareq Abadl Differences the 3 Common Iron Tests

Tareq Abadl, Medical Laboratory Specialist and Director of the Blood Bank at Dr. Abdelkader Al-Mutawakkil Hospital, posted on LinkedIn:

“The Difference Between the 3 Common Iron Tests

Serum Iron – Ferritin – TIBC/Transferrin

In the lab, we often see these tests confused because they sound similar—but each one tells a very different story about the patient’s iron status.

Tareq Abadl Differences the 3 Common Iron Tests

1) Serum Iron

This is the circulating iron currently bound to transferrin in the bloodstream.
Think of it as a snapshot of iron at this moment.

Key Notes:

Strongly affected by diet and timing.

Can appear high/low without reflecting true iron stores.

Not reliable alone for diagnosing anemia.

2) Ferritin

This is the true iron storage in the body—your iron “vault.”

Important Points:

First to drop in iron deficiency.

Most stable indicator of iron status.

Rises with inflammation (acute phase reactant).
The most important test to confirm iron deficiency anemia.

3) TIBC / Transferrin

Represents the number of empty seats available to bind iron.

When the body needs iron → TIBC increases ↑

When iron is high → TIBC decreases ↓

Very useful for differentiation:

Iron Deficiency

Serum iron ↓

Ferritin ↓

TIBC ↑

Anemia of Chronic Disease

Serum iron ↓

Ferritin normal or ↑

TIBC ↓

Quick Lab Summary:

Serum Iron = what’s in the blood right now.
Ferritin = the true storage
TIBC = does the body need iron or not?”

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Ferritin Health Hematology Hemostasis Hemostasis Today Medicine Serum Iron Tareq Abadl TIBC/Transferrin
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