Iron Tests

Our iron blood tests assess key biomarkers involved in iron status, including ferritin, iron, transferrin saturation, total iron-binding capacity (TIBC), and, in selected tests, a full blood count (FBC).

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Iron and FBC Blood Test

If you're feeling constantly tired, weak, or lightheaded, this test checks key markers linked to anaemia and overall blood health

  • Results estimated in 2 working days
  • 19 biomarkers
£75.00
New
Advanced Iron Blood Test

Are you seeking insights into your iron status and overall wellbeing? By evaluating blood cell counts and iron levels alongside vital organ functions, this test enables you to take a holistic approach to your health

  • Results estimated in 2 working days
  • 36 biomarkers
£119.00
Iron Blood Test

Feeling constantly tired or struggling with low energy? Your iron levels could be the reason

  • Results estimated in 3 working days
  • 5 biomarkers
£49.00
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“Iron-related conditions are common in the UK, causing symptoms like fatigue and weakness. An iron blood test is a great way to understand your iron status.”

Dr Tina Ghela, Head of Clinical, Medichecks

Which iron blood test should I choose?

The most appropriate test depends on your symptoms and what you're looking to investigate.

  • You're concerned about iron deficiency: The Advanced Iron Blood Test measures ferritin, iron, transferrin saturation, FBC, and other key biomarkers to provide the most complete assessment of your iron status.
  • You're monitoring previously low iron levels: The Iron Blood Test is suitable for checking your iron levels over time and monitoring your response to treatment or iron supplementation.
  • You have ongoing fatigue or want a broader health assessment: The Advanced Well Woman Blood Test, Advanced Well Man Blood Test, and Ultimate Performance Blood Test include iron studies alongside a full blood count and a wide range of biomarkers to investigate other potential causes of symptoms such as fatigue, low energy, or weakness.
Signs you might benefit from an iron blood test

Iron deficiency can develop gradually, and symptoms aren't always obvious at first.


An iron blood test may be appropriate if you have:

  • Persistent tiredness or fatigue.
  • Shortness of breath during normal activities.
  • Frequent headaches or dizziness.
  • Pale skin.
  • Poor concentration or brain fog.
  • Restless legs.
  • Heavy menstrual periods.
  • A vegetarian or vegan diet, or a condition that affects nutrient absorption.
  • Because these symptoms can have many causes, testing can help determine whether iron deficiency may be contributing.
What's the difference between ferritin and iron?

Although they're often discussed together, ferritin and iron measure different aspects of your iron status.

  • Ferritin reflects your body's stored iron and is often the earliest marker to fall when iron deficiency develops.
  • Iron measures the amount of iron circulating in your bloodstream at the time of testing.
  • Other biomarkers, such as transferrin saturation and TIBC, help indicate how effectively your body transports and uses iron.
    Looking at these results together provides a much more complete assessment than measuring iron alone.

FAQs

What's the best blood test for iron deficiency?

The most useful test usually includes ferritin, iron, transferrin saturation, and other iron biomarkers rather than measuring iron alone. Ferritin is generally considered the best indicator of your body's iron stores.

What does ferritin measure?

Ferritin is a protein that stores iron inside your body. A low ferritin level usually indicates depleted iron stores, even before anaemia develops.

Can I have low ferritin but normal haemoglobin?

Low ferritin can occur before your haemoglobin falls, which means iron deficiency may be present without anaemia. Identifying low iron stores early allows treatment before symptoms worsen.

Should I take iron supplements without a blood test?

It's usually best to confirm iron deficiency before taking iron supplements. Too much iron can be harmful, and symptoms such as tiredness aren't always caused by low iron.

What causes iron deficiency?

Iron deficiency may result from heavy menstrual bleeding, pregnancy, inadequate dietary intake, blood loss, digestive conditions that reduce iron absorption, or other underlying medical conditions. Further investigation may sometimes be needed to identify the cause.

How often should I repeat an iron blood test?

If you're taking iron supplements or treating iron deficiency, your healthcare professional may recommend repeat testing after several weeks or months to assess your response to treatment.

Can an iron blood test diagnose anaemia?

An iron blood test helps identify whether iron deficiency may be contributing to anaemia, but an FBC is also needed to diagnose anaemia and assess the size and number of your red blood cells.