Always Tired? A Private Fatigue Blood Test in London Can Find the Cause
Who This Test Is For (Read This First)
This service is for you if you feel constantly tired, drained, or low in energy – even after sleep.
You should consider a fatigue blood test in London if you:
- Wake up tired most days
- Feel exhausted despite “normal” life
- Rely on caffeine to get through the day
- Experience brain fog, weakness, or low motivation
- Have not had blood tests in the last 12 months
Many people assume fatigue is “stress” or “age”.
In reality, fatigue often starts in the blood.
At Marylebone Diagnostic Centre, we help patients identify the real cause of fatigue quickly – with private blood testing in Central London and doctor-reviewed results in 24 – 42 hours.
Why You Should Test Fatigue Now (Not Later)
Fatigue is rarely random.
In our clinic, people who feel “just tired” often show:
- Low vitamin D
- Iron deficiency
- Thyroid imbalance
- Blood sugar instability
- Liver or kidney strain
- Early inflammation
These issues do not always cause pain, which is why they are missed.
Waiting for symptoms to worsen usually means:
- Longer recovery
- More tests later
- More frustration
A fatigue blood test helps catch problems early, when fixes are simpler.
Why Marylebone Diagnostic Centre Is the Right Choice
This is not a rushed appointment.
This is not a generic screening kit.
At MDC, fatigue testing is:
- 📍 Based in Marylebone, Central London
- ⚡ Results in 24 – 42 hours
- 🔬 QC-validated laboratory testing
- 👩⚕️ Clinician-reviewed reports
- 🔒 Private & discreet
- 🚇 5-minute walk from Baker Street Tube
Most importantly, we look at fatigue as a system issue, not a single number.
What Causes Ongoing Fatigue? (The Medical Reasons)
Fatigue usually comes from one or more internal imbalances.
Vitamin Deficiencies
Low vitamin D and B12 are extremely common in the UK.
They affect:
- Energy production
- Muscle strength
- Brain function
- Immunity
Iron Deficiency (Low Ferritin)
You do not need to be anaemic to feel exhausted.
Low iron causes:
- Weakness
- Shortness of breath
- Poor exercise tolerance
- Heavy legs
Thyroid Imbalance
A slow or struggling thyroid affects:
- Energy
- Weight
- Mood
- Temperature regulation
Blood Sugar Instability
Even without diabetes, glucose swings cause:
- Crashes
- Brain fog
- Afternoon exhaustion
Liver or Kidney Stress
Your detox and filtration systems affect energy more than people realise.
Inflammation
Low-grade inflammation drains energy silently.
This is why testing one marker alone rarely gives answers.
What a Fatigue Blood Test at MDC Includes
We do not guess.
We test the systems most linked to low energy.
Core Fatigue Blood Tests
| System Checked | Blood Tests | Why It Matters |
| General Health | Full Blood Count | Infection, anaemia |
| Vitamins | Vitamin D, B12 | Energy & immunity |
| Iron Stores | Ferritin | Oxygen delivery |
| Thyroid | TSH, Free T4 | Metabolism & fatigue |
| Blood Sugar | HbA1c | Energy crashes |
| Liver | ALT, AST, ALP | Detox & metabolism |
| Kidneys | Creatinine, eGFR | Filtration & hydration |
| Inflammation | CRP | Hidden inflammation |
| Minerals | Magnesium | Muscle & nerve energy |
This is why many patients choose a combined health check, not a single test.
If you feel tired most days and want clear answers, not guesses:
Book a Private Fatigue Blood Test in London
📍 Marylebone Diagnostic Centre – Baker Street
⏱ Results in 24–42 hours
🔗 This testing is part of our Adult Health Check
Fatigue vs “Normal Tiredness” – How to Tell the Difference
Normal tiredness:
- Improves with rest
- Comes after exertion
- Is temporary
Medical fatigue:
- Persists daily
- Affects concentration
- Feels heavy or draining
- Does not improve with sleep
If fatigue has lasted more than 2–3 weeks, testing is sensible.
Which MDC Test Is Best for Fatigue?
Option 1: Adult Health Check (360° Overview)
Best if fatigue is unexplained or long-standing.
Covers:
- Blood count
- Vitamins
- Thyroid
- Liver & kidneys
- Cholesterol
- HbA1c
- Inflammation
This is the most common choice for fatigue
Option 2: Vitamin & Fatigue Panel
Best if fatigue is the main symptom and you want a focused approach.
Covers:
- Vitamin D
- B12
- Iron
- Magnesium
Option 3: Add-On Testing
Depending on results, we may recommend:
- Hormone testing
- Extended mineral testing
- Further metabolic markers
All testing is direct access, no GP referral needed.
If you have not had blood tests in the last year and feel tired often:
Start with an Adult Health Check in Central London
This gives the clearest picture in one visit.
How the Process Works
- Book online or call MDC
- Visit our Baker Street clinic
- Blood taken by trained professionals
- Results in 24–42 hours
- Clinician-reviewed report
- Clear next steps
No NHS waiting lists.
No repeated GP appointments.
Frequently Asked Questions
What You Should Do Next
If you:
- Feel tired most days
- Haven’t tested recently
- Want clarity, not assumptions
Your next step is simple.
Book a Private Blood Test & Health Check in Central London
This fatigue test feeds directly into our full adult health assessments.
Book at: Marylebone Diagnostic Centre
📍 73 Baker Street, London W1U 6RD
📞 +44 7495 970109
🕗 Monday–Saturday, 08:00–16:00
Fast. Private. Clinically trusted.
Quick Links
- Cardiac Profile
- HbA1c Test
- Full Lipid Panel
- Fatigue and Energy Profile
- Kidney Function Test
- Electrolytes Test
- Liver Function Test
- Thyroid Function Test
- Magnesium Test
- Full Blood Count
- Urinalysis & Culture
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