What Does a Full Blood Count Tell You? The Test Every Adult Should Consider
By Tharb Faisl
Your Blood Holds Clues to Your Health – Are You Listening? Whether you’re feeling run down, constantly tired, or just want a health check, a Full Blood Count (FBC) is often the first test a doctor or clinic will request.
It’s fast. It’s affordable. And it can quietly detect everything from anaemia to inflammation, infection, and more.
At Marylebone Diagnostic Centre, we include the FBC in nearly all of our most popular health packages – because it’s that powerful.
Book Your Full Blood Count Test in London Today!
What Is a Full Blood Count (FBC)?
An FBC is a general health screening that measures different components of your blood, including:
| Component | What It Measures | What It Can Reveal |
| Red Blood Cells (RBC) | Oxygen transport | Anaemia, fatigue, bleeding |
| Haemoglobin (Hb) | Oxygen-carrying protein | Iron deficiency, chronic illness |
| White Blood Cells (WBC) | Immune cells | Infections, immune disorders |
| Platelets | Blood clotting | Bleeding risk, bone marrow disorders |
| Haematocrit | RBC percentage in blood | Hydration, blood loss |
| MCV/MCH/MCHC | Red cell size and content | Vitamin B12 or folate deficiency |
Book Your Full Blood Count Test in London Today!
Signs You Might Need an FBC
Feeling tired all the time
Looking pale or bruising easily
Prone to infections
Unexplained weight loss
Long COVID symptoms
Before starting new medications or fertility treatment
Why Choose Marylebone Diagnostic Centre for Your FBC?
Our same-day appointments and rapid turnaround mean you won’t wait weeks for answers. You’ll get:
- Expert interpretation by experienced clinicians
- Same-day blood collection in Central London
- Results in 24–48 hours
- Optional add-on tests (e.g. B12, Iron, Thyroid)
- Support in understanding next steps
We’re based on Baker Street, near Harley Street, Paddington, and Kings Cross — easy to access, discreet, and fast.
Real People, Real Results
“I came in just to check my energy levels. My FBC showed low haemoglobin and led to a full anaemia work-up. I finally got answers.”
— Stephanie, 34, Marylebone
“Quick, clean, and efficient. I walked in on Monday, had my results by Tuesday evening.”
— Tariq, 47, Mayfair
Book Your Full Blood Count Test in London Today!
FAQs – Full Blood Count
Book Your Full Blood Count Test in London Today!
Ready for Clarity?
Walk-in testing in Central London
Fast results, friendly service
Fully confidential
Combine with vitamin, thyroid, or iron panels
Book Your Full Blood Count at Marylebone Diagnostic Centre