
Always Tired? What a Fatigue Blood Test Can Reveal
By Tharb Faisl
Why Am I Always Tired? Constant fatigue can be frustrating and isolating. You may feel like you’re dragging through your days, even after a full night’s sleep. The causes are often deeper than just stress or lack of rest.
A fatigue blood screen can help uncover the hidden health issues contributing to that exhaustion — and at Marylebone Diagnostic Centre, we make that process simple and fast.
Book Your Fatigue Blood Test in LondonToday!
What’s Included in a Fatigue Blood Panel?
At our London clinic, we’ve developed a tailored Tired All the Time blood screen that explores the most common biological reasons for fatigue:
Test | What It Checks |
Full Blood Count (FBC) | Anaemia or low white cell counts |
Thyroid Function (TSH, Free T4) | Underactive thyroid (hypothyroidism) |
Vitamin D | Low levels linked to fatigue, low mood, immune weakness |
Vitamin B12 & Folate | Crucial for red blood cell production and nerve health |
Ferritin & Iron Panel | Low iron stores are a common cause of tiredness |
Glucose & HbA1c | Blood sugar regulation and potential prediabetes |
CRP & ESR | Inflammation markers that may signal chronic disease |
These tests help us identify issues like anaemia, underactive thyroid, vitamin deficiencies, or early diabetes — all common but often overlooked causes of fatigue.
Book Your Fatigue Blood Test in LondonToday!
When Should You Book a Fatigue Blood Test?
You should consider a blood panel if you experience:
- Low energy despite rest
- Poor concentration or brain fog
- Frequent illness or weakened immunity
- Unexplained weight changes
- Mood disturbances like anxiety or low mood
Book Your Fatigue Blood Test in LondonToday!
Why Marylebone Diagnostic Centre?
Comprehensive fatigue screening from £199
Located minutes from Baker Street, Harley Street, Kings Cross, Paddington, and Marylebone
Same-day appointments and fast results
Expert interpretation and optional follow-up advice
No GP referral needed
We understand that fatigue is real — and we’ll help you get answers.
Book Your Fatigue Blood Test in LondonToday!
Patient Experience
“I thought I was just burned out, but the test showed I had low B12 and borderline thyroid. I finally feel like I’m getting control of my health again.”
– Adam, 34, Kings Cross
FAQs – Fatigue Testing
Book Your Fatigue Blood Test in LondonToday!
Book Your Fatigue Blood Test in LondonToday!
If tiredness is affecting your work, relationships, or mood — don’t ignore it. The right blood test can change everything.
Private, discreet, professional
Clear answers
Same-day bookings available
Book Your Fatigue Panel at Marylebone Diagnostic Centre
Read More:
➤ NHS – Tiredness and Fatigue
➤ British Society for Haematology – Iron Deficiency