One of the most common and informative of these tests is the Full Blood Count (FBC), sometimes called a Complete Blood Count (CBC). It’s a quick, hassle-free test that can offer valuable insights into your overall health.  

In this guide, we’ll break down what it measures, what your results might mean, and how you can get one done easily through Superdrug Clinics. 

 

What is a Full Blood Count (FBC) test? 

In simple terms, an FBC is a blood test that checks the number and types of cells in your blood. It provides an overview of your red blood cells, white blood cells, and platelets to determine if everything looks normal or if something might need a closer look. 

Doctors use full blood count tests as a kind of “health snapshot.” They’re often performed as part of a general health check or to help investigate symptoms such as tiredness, weakness, or infection. 

  

What does an FBC test measure? 

A full blood count test measures several different components in your blood:  

Red blood cell count (RBC): Red blood cells carry oxygen around your body to wherever it is needed. A low red blood cell count suggests anaemia, whereas a high count could indicate problems with your lungs, heart, or kidneys.  

White blood cell count (WBC): Your white blood cells are a central part of your immune system. If your white blood cell count is higher or lower than expected, it could suggest infections, inflammation, or immune problems. 

Platelet count: Platelets help clot your blood to stop bleeding and support wound healing. If your levels are low, you might bruise easily or have trouble stopping bleeding. High levels might increase your risk of blood clots. 

Haematocrit: Your haematocrit tells you what percentage of your blood is made up of red blood cells. The rest is mostly plasma, with a small amount made up of white cells and platelets. A low haematocrit suggests you’re anaemic. 

Haemoglobin count: Haemoglobin is the protein found inside red blood cells that carries oxygen. If your haemoglobin is low, your body may not be getting enough oxygen, even if you have a normal red blood cell count. 

 

Why is a FBC test done? 

• Your GP or healthcare provider might request a Full Blood Count test for several reasons: 

• You’re feeling unusually tired or run down 

• You’ve had ongoing infections or fevers 

• You’re having surgery or a general health check 

It’s also one of the first steps in investigating symptoms like dizziness, bruising, or changes in energy levels. Or perhaps you’re curious and want to gain a better understanding of your overall health. Whatever the reason, the test is quick, simple, and usually done within a few minutes. 

How to prepare for an FBC test

You don’t need to do anything to prepare for a Full Blood Count test. Fasting isn’t typically required unless your FBC is done alongside other tests that need it (your doctor will let you know). That said, here are a couple of easy tips: 

• Stay well hydrated, as this helps make finding a vein and drawing blood easier. 

• Wear something with loose sleeves to make it easier to roll up for the test. 

• Tell the nurse if you’re nervous around needles, as they’ll help you feel more at ease. 

  

Understanding your results 

It’s normal to feel a bit confused when looking at lab results, but don’t panic. Your FBC results will be clearly listed in a table, showing the types of blood cells and your corresponding measures for each.  

Alongside your result, you will find the normal range for each blood component. Don’t worry if something is slightly outside of what is typical. These ranges are a guide, and slight variations aren’t always a cause for concern. Anything significantly out of range will be flagged.  

If anything is marked as abnormal, we suggest getting your results reviewed by a pharmacist or GP. They’ll be able to provide advice on what it means and whether any further tests or steps are needed. 

The Superdrug Blood Tests will include commentary and analysis from one of our Thriva Doctors to ensure you understand your results and recommendations.
 

Common conditions detected with an FBC test 

An FBC won’t give you a diagnosis on its own, but it’s a fantastic first step that can help highlight if something is worth looking into further. Here are some of the most common things it can flag: 

Anaemia: If your red blood cell count, haemoglobin, or haematocrit is low, it may suggest anaemia, a condition where your body isn’t getting enough oxygen to its tissues and organs.  

Infection: A raised white blood cell count can mean your immune system is in action, possibly fighting off a viral or bacterial infection.  

Inflammation: Higher-than-usual levels of white blood cells or platelets can indicate inflammation somewhere in the body, often linked to chronic conditions. 

Clotting issues: An unusually high platelet count may increase the risk of blood clots and associated complications, such as heart attacks and strokes. 

Bone marrow conditions: Since nearly all blood cells are made in the bone marrow, abnormal results may point to an issue with how your bone marrow is functioning. 

 

Blood test near me: Services at Superdrug 

If you’re due a Full Blood Count test or simply want a clearer picture of your overall health, Superdrug makes it easy to get checked. We include one in our Advanced Health Check (Blood Test), available at Superdrug Health Clinics across the UK, for this test you will need to fast. 

Appointments are easy to book online, blood draws are carried out by our trained phlebotomists and clinical nurse advisors, and your results come back quickly. Our experts review everything, so you’ll know exactly what your numbers mean and whether you need to take any next steps. 

Whether you’re feeling unwell or simply curious about what’s happening in your body, a general check-up can be a helpful way to stay on top of your health.  

Book your blood test with Superdrug today or view our full range of blood tests here. 

https://labtestsonline.org.uk/tests/full-blood-count-fbc