Ferritin Blood Test | Iron Stores | London Blood Tests

Check your iron stores with our Ferritin blood test for £38. UKAS-accredited testing, fast results, and optional GP consultation available.

The Ferritin Blood Test measures ferritin — a protein that stores iron in the body — and is the most reliable marker of iron deficiency or iron overload. Testing is carried out in a UKAS-accredited laboratory, with fast turnaround times and an optional GP consultation for result interpretation.

What is a Ferritin Blood Test?

Ferritin is a protein that stores iron inside cells and releases it when the body needs it. Measuring ferritin levels in the blood provides an accurate reflection of your total iron stores, rather than just circulating iron levels.

Low ferritin is the earliest and most sensitive indicator of iron deficiency, often occurring before anaemia develops. High ferritin levels, on the other hand, may indicate iron overload, chronic inflammation, liver disease, or metabolic conditions.

The Ferritin Blood Test is commonly used to:

• Diagnose iron deficiency

• Investigate unexplained fatigue

• Assess hair loss or brittle nails

• Monitor anaemia treatment

• Detect iron overload (e.g. haemochromatosis)

At London Blood Tests, ferritin is measured using validated immunoassay methods in line with UK clinical standards.

Benefits of the Ferritin Test

1. Best Marker of Iron Stores
   Ferritin reflects stored iron levels and detects deficiency earlier than haemoglobin alone.

2. Identifies Hidden Iron Deficiency
   Low ferritin can exist even when haemoglobin levels appear normal.

3. Supports Fatigue and Hair Loss Investigation
   Iron deficiency is a common cause of tiredness and hair shedding.

4. Monitors Iron Supplementation
   Helps track response to iron therapy and prevent over-supplementation.

5. Detects Iron Overload
   Elevated ferritin may indicate haemochromatosis or iron accumulation.

6. Useful for Women and Athletes
   Particularly important for menstruating women and endurance athletes.

7. Optional GP Consultation for Interpretation
   Results can be reviewed with a GP to guide treatment or further testing.

Why Do I Need a Ferritin Blood Test?

You may benefit from a ferritin test if you experience symptoms linked to iron imbalance, including:

• Persistent fatigue or weakness

• Hair loss or thinning

• Shortness of breath

• Dizziness or headaches

• Pale skin

• Brittle nails

• Restless legs

Testing is also recommended if you:

• Have heavy menstrual periods

• Follow a vegetarian or vegan diet

• Are pregnant or planning pregnancy

• Have digestive or absorption disorders

• Have a family history of iron overload

Because iron imbalance can exist without obvious symptoms, ferritin testing is key for preventive health.

How the Test Works

In-Clinic Testing at London Blood Tests

1. Book Your Appointment

   • Book online or by phone at your chosen clinic.

   • Fasting is not required.

2. Pre-Test Review

   • Inform the clinician if you take iron supplements or have recent illness.

3. Sample Collection

   • A trained phlebotomist collects a venous blood sample.

   • Takes approximately 5–10 minutes.

4. Laboratory Analysis

   • Sample analysed in a UKAS-accredited laboratory.

5. Quality Control

   • Results undergo internal verification before release.

6. Results Delivery

   • Results are typically available within 1–2 business days.

7. Optional GP Consultation

   • Discuss results and next steps with a GP if required.

At-Home Blood Draw (Home or Hotel Phlebotomy – UK-Wide)

1. Book Your Visit

   • Arrange a phlebotomist home or hotel visit at a suitable time.

2. Professional Collection

   • Certified phlebotomist collects your blood sample.

3. Secure Transport

   • Sample couriered same day to the laboratory.

4. Laboratory Testing

   • Analysis identical to clinic testing.

5. Results & Follow-Up

   • Results delivered online, GP review optional.

Your Ferritin Test Results – Explained

Ferritin results are reported in µg/L (ng/mL).

Typical UK reference ranges:

• Adult men: ~ 30–400 µg/L

• Adult women: ~ 15–150 µg/L

Interpretation:

• Low ferritin: iron deficiency (even if haemoglobin is normal)

• Normal ferritin: adequate iron stores

• High ferritin: possible iron overload, inflammation, or liver disease

Ferritin is an acute-phase reactant, meaning levels can rise during infection or inflammation. Results should be interpreted alongside CRP and iron studies when needed.