fatigue blood testing

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:

TestWhat It Checks
Full Blood Count (FBC)Anaemia or low white cell counts
Thyroid Function (TSH, Free T4)Underactive thyroid (hypothyroidism)
Vitamin DLow levels linked to fatigue, low mood, immune weakness
Vitamin B12 & FolateCrucial for red blood cell production and nerve health
Ferritin & Iron PanelLow iron stores are a common cause of tiredness
Glucose & HbA1cBlood sugar regulation and potential prediabetes
CRP & ESRInflammation 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

Marylebone diagnostic centre main

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

Do I need to fast for this test?
Fasting isn’t usually required, but we’ll let you know based on your profile.
Can I do this test without symptoms?
Yes — it’s a great preventative check, especially during periods of stress or low energy.
Are the results easy to understand?
Absolutely. We’ll provide a clear report and offer further testing or advice if needed.
Can I add other tests like hormones or allergies?
Yes — we can build a custom fatigue screen just for you.

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