Ferritin Blood Test

Ferritin Blood Test

The Ferritin Blood Test measures ferritin—a protein that stores and transports iron. Because free iron can be toxic, ferritin safely regulates it. Low ferritin suggests depleted iron stores, while high ferritin may reflect excess iron or conditions like inflammation or infection. Testing ferritin helps assess iron status and may provide clues about inflammatory activity.

Why Measure Ferritin?

• Check iron stores: Differentiate iron deficiency from other causes of anemia.
• Guide treatment: Monitor iron repletion or assess potential iron overload.
• Context for symptoms: Fatigue, hair loss, or reduced exercise tolerance may warrant evaluation.

How the PlexusDx Test Works

• At-home collection with a finger-prick kit and prepaid return.
• Results in ~2 business days after the lab receives your sample.
• No doctor’s order required; HSA/FSA eligible.

Understanding Results

Providers often interpret ferritin with hemoglobin/hematocrit and clinical context to decide on diet changes, iron supplementation, or further evaluation.

What Can Influence Ferritin?

• Inflammation or infection (can elevate ferritin).
• Iron intake/supplements and blood loss.
• Liver disease and chronic illness.

FAQs

Is ferritin the same as iron?
No. Ferritin reflects iron stores, while serum iron reflects iron circulating at the time of the blood draw.

Do I need to fast?
Fasting isn’t always required; follow the included kit instructions.