Look beneath persistent, unexplained tiredness
Tiredness & Fatigue
Persistent tiredness rarely has a single cause, which is why a broad look often reveals more than a narrow one. This panel examines the most common physical contributors to fatigue in one go: anaemia and iron stores, vitamin B12, folate and vitamin D levels, thyroid function, and blood sugar. It turns a vague, frustrating symptom into something you can investigate.
A full blood count and detailed iron studies can reveal anaemia, one of the most frequent reasons for feeling drained. Low vitamin D, B12 or folate can quietly sap energy, an underactive thyroid slows everything down, and raised blood sugar can leave you flat. Measuring them together helps pinpoint where your tiredness may be coming from.
Your sample is a single venous draw taken in our private Leigh-on-Sea clinic and analysed by an accredited UK laboratory, with a doctor’s report explaining what each result means and any sensible next steps. It is a clear, practical starting point for a conversation with your GP.
Preparation: A morning appointment is preferred. No fasting is required for this panel. If you take vitamin B12, folate or iron supplements, mention them for your report, as they can influence some of the results.
Inside this panel
18 biomarkers in 4 areas
Worth considering if
- Constant tiredness that rest doesn’t fix
- Low energy or stamina
- Difficulty concentrating or brain fog
- Feeling weak, pale or run down
- Breathlessness on mild exertion
- Low mood alongside fatigue
Who this test suits
- Anyone feeling persistently tired without an obvious reason
- People run down despite reasonable sleep and diet
- Those wanting to rule out common physical causes of fatigue
- Anyone preparing for a more informed conversation with their GP
- Full blood count7 markers
- Haemoglobin (Hb)
- Red Cell Count (RBC)
- Packed Cell Volume (PCV)
- Mean Cell Volume (MCV)
- Platelets
- White Blood Cells (WBC)
- White Cell Differential
- Iron status5 markers
- Iron
- Ferritin
- Total Iron Binding Capacity (TIBC)
- Unsaturated Iron Binding Capacity (UIBC)
- Transferrin Saturation
- Vitamins3 markers
- Vitamin B12 (Active)
- Vitamin B9 (Serum Folate)
- Vitamin D
- Thyroid & blood sugar3 markers
- TSH (thyroid-stimulating hormone)
- Free T4 (thyroxine)
- HbA1c
- 1
Book your time
Choose a slot that suits you. Appointments only, so the clinic is yours.
- 2
A gentle draw
Demi takes your venous sample in minutes, in a calm private room.
- 3
Doctor-reviewed report
Your results arrive within 5–7 working days, explained marker by marker.
About this test
Fatigue has many possible physical causes: anaemia, low vitamins, thyroid changes or raised blood sugar among them. Checking them together makes it far more likely you will find a meaningful answer than testing one at a time.
Yes, and that is useful too. Normal results help rule out common physical causes and point you and your GP towards other factors, such as sleep, stress or lifestyle, worth exploring next.
Your doctor-reviewed report is usually ready within 5–7 working days of your sample reaching the laboratory.
