Fatigue & Tiredness Blood Test Kit (9 Biomarkers)
Biomarkers
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Ferritin
Measures the amount of iron safely stored in your body's cells (liver, spleen, and muscles) for future use. Because ferritin stores deplete before circulating iron levels drop, this is the single most important marker for catching iron deficiency early.
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White Blood Cell Count (WBC)
These cells are the frontline soldiers of your immune system. Doctors check this number to look for hidden infections, autoimmune responses, or inflammation. If your WBC count is elevated, it usually means your immune system is working exactly as it should by actively fighting off an illness, reacting to an allergen, or helping your body recover from stress.
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Red Blood Cell Count (RBC)
Think of red blood cells as the body's delivery trucks for oxygen. Measuring the total number of these cells provides a great baseline for your general blood health and energy levels. An abnormal count, whether too high or too low, can help doctors pinpoint the cause of persistent tiredness or point toward potential dietary deficiencies, such as a lack of iron or B vitamins.
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Haemoglobin (Hb)
This is the crucial iron-rich protein inside your red blood cells that physically grabs onto oxygen from your lungs and carries it to the rest of your body. Checking these levels helps identify anaemia. If your haemoglobin is low, your organs and muscles aren't getting the oxygen they need to function properly, which is often the culprit behind feeling constantly exhausted, weak, or short of breath.
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Hematocrit (HCT)
The proportion, by volume, of your blood that consists of red blood cells.
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Mean Corpuscular Volume (MCV)
Measures the average size of your red blood cells. Abnormally large or small cells help determine the specific underlying cause of anaemia.
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Mean Corpuscular Haemoglobin (MCH)
The average amount of oxygen-carrying haemoglobin present inside a single red blood cell.
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Mean Corpuscular Haemoglobin Concentration (MCHC)
The average concentration (density) of haemoglobin within a specific volume of red blood cells.
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Iron
Measures the amount of iron currently circulating in your blood. While essential for daily energy and red blood cell production, this level naturally fluctuates depending on your recent diet.
Frequently Asked Questions
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Can a blood test show iron deficiency anaemia?
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Yes. A ferritin blood test measures your body's iron stores, while a full blood count checks red blood cell count, haemoglobin, and other markers affected by iron deficiency. Together, these two tests can identify iron deficiency and anaemia before symptoms become severe.
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What is the difference between low ferritin and anaemia?
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Ferritin measures your stored iron levels, while anaemia refers to a reduction in red blood cells or haemoglobin that affects the blood's ability to carry oxygen. You can have low ferritin without being formally anaemic, but low ferritin is often an early warning sign that anaemia may develop if left unaddressed. Testing both together gives the most complete picture.
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Why am I always tired?
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Persistent fatigue is one of the most common symptoms of low ferritin and iron deficiency. Other signs include weakness, reduced exercise tolerance, difficulty concentrating, and feeling cold.
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Turnaround Time
Turnaround Time
Test Preparation
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Ferritin and Blood Cell Count
Fasting is not required for a ferritin test and blood cell count test, as levels are not significantly affected by recent meals. However, you should avoid fatty meals at least 6 hours before collecting your sample.
The most important consideration is recent illness or infection. Ferritin is an acute-phase protein, meaning levels can rise significantly in response to inflammation or infection, even a mild cold. To avoid a falsely elevated result, wait until you have fully recovered before collecting your sample.
Symptom Check
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Fatigue
Low ferritin and abnormalities in the blood count may be associated with iron deficiency and anaemia. Symptoms can include persistent tiredness, weakness, reduced exercise tolerance, shortness of breath, dizziness, headaches, pale skin, cold hands and feet, poor concentration, brittle nails, and increased hair shedding.
Result Report
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Result Report (in-use)
The final report provides a comprehensive breakdown of your biomarkers, displaying your specific levels alongside standard UK reference ranges to show exactly where you fall on the spectrum. Beyond just the raw numbers, the report includes a brief commentary.
View your results in a clear, easy-to-understand format with charts and reference ranges. If you repeat the same biomarkers with us, your report includes historical comparisons to help track changes, trends, and progress over time.