Energy & Fatigue
£55.00
A Tiredness and Fatigue Blood Test is a reliable method to uncover the underlying causes of your symptoms. This test can help diagnose conditions such as anemia, thyroid disorders, or other health issues linked to fatigue, providing valuable insights for effective treatment.
- Iron
- Transferrin Saturation
- UIBC
- CRP HS
- Free Thyroxine (FT4)
- Ferritin
- TIBC
- Vitamin D
- Free Triiodothyronine (FT3)
- Thyroid Stimulating Hormone (TSH)
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Biomarkers
Iron
The body obtains iron from dietary sources and through the breakdown and recycling of red blood cells. If a blood test indicates low iron levels, treatment typically involves dietary adjustments or iron supplements.
Key Biomarkers for Iron Levels:
Ferritin: Indicates iron storage in the body.
Iron: Measures circulating iron in the blood.
Total Iron-Binding Capacity (TIBC): Assesses the blood’s capacity to bind and transport iron.
Transferrin Saturation: Reflects the percentage of transferrin (an iron-transport protein) bound to iron.
Unsaturated Iron-Binding Capacity (UIBC): Represents the available binding sites for iron on transferrin.
Thyroxine (T4)
Thyroid Stimulating Hormone (TSH)
Vitamin D
Free triiodothyronine (FT3)
FT3 exerts its effects by binding to specific receptors in various tissues, triggering gene transcription and modulating cellular metabolism. This hormone is essential for maintaining the basal metabolic rate, energy production, and the utilization of carbohydrates, proteins, and fats. Additionally, FT3 supports normal cardiovascular function, neurological development, and reproductive health.
Accurate measurement of FT3 levels is crucial for diagnosing and managing thyroid disorders, such as hyperthyroidism and hypothyroidism. Proper assessment enables targeted treatment to restore hormonal balance and enhance overall well-being.
hs-CRP
Information
Symptoms of Tiredness and Fatugue
Difficulty sleeping or insomnia
Headaches
Sore or aching muscles
Muscle weakness
Slower reflexes or response times
Impaired decision-making
Mood swings or irritability
Reduced coordination
Difficulty concentrating
Short-term memory issues
Additional Insight from Dr Sameer Nakedar, MBBS, MRCGP, PGCert
Iron Levels: Iron studies assess your iron stores. Low iron levels can lead to anaemia and fatigue, while excessively high levels may also cause health issues.
Vitamin D: Low Vitamin D levels are a common cause of tiredness, so this is included in the evaluation.
Thyroid Function: Thyroid disorders, especially an underactive thyroid, can result in fatigue and are screened as part of this panel.
Identifying these markers provides an important starting point for understanding the potential causes of fatigue. Early detection allows for timely interventions and personalised medical care to help you feel your best.”
Additional Information
If you’re experiencing persistent fatigue, it’s important to consult with your doctor to determine whether a blood test is necessary to identify the underlying cause.
Why Take a Tiredness and Fatigue Blood Test
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Experts Opinion

Dr Sameer Nakedar
MBBS, MRCGP, PGCert
How to take a Energy & Fatigue
Collecting a blood sample for your finger prick home test is simple and easy to do. Watch the video below for step-by-step instructions on how to perform the test at home.
How Welzo Home Tests Work
1. Pick your home test
2. Take your test
3. Results within 48 hours
Energy & Fatigue Information
Specification of Energy & Fatigue
Also Known As / Related Tests: Fatigue Test, Energy Test
Biomarkers Tested:
Iron
Total Iron Binding Capacity (TIBC)
Vitamin D
High-Sensitivity C-Reactive Protein (hs-CRP)
Ferritin
Transferrin Saturation
Thyroxine (T4)
Sample Type: SST (Gold Microtainer)
Brand: Welzo
Turnaround Time: Approximately 24 hours
Laboratory Test Ranges: (Insert specific ranges here if available)
Test Kit Marking: MHRA/UKCA
Location of Laboratory: United Kingdom
What does a Energy & Fatigue for?
Iron
Total Iron Binding Capacity (TIBC)
Vitamin D
High-Sensitivity C-Reactive Protein (hs-CRP)
Ferritin
Transferrin Saturation
Thyroxine (T4)
This format provides a more organized and professional presentation, making it easier to read and understand.
Are Energy & Fatigues available on the NHS?
FAQs
How does a blood test detect tiredness and fatigue?
When should you complete a tiredness and fatigue blood test?
Where do I send my sample?
What do I need to do before my test? i.e. fast, no drinking, etc
When will I get my results/how will I receive my results?
What causes extreme tiredness and fatigue?
Anaemia
Chronic Fatigue Syndrome
Depression
Hypothyroidism
Sleep Disorders
If you are experiencing persistent fatigue, it’s important to consult with your doctor. They can perform the necessary tests and help identify the root cause, enabling you to receive the most effective treatment.
How often should you take a tiredness blood test?
What if my results show that I’m outside the normal range?
Disclaimer: If your results are abnormal, we are not responsible for follow-up care or notifying healthcare providers. By taking this test, you acknowledge and agree to independently follow up with a healthcare professional for further guidance and treatment.
