Bio LabComplete blood count (CBC)
Reviewed by Dr. Sanaa Ghoneim, Medical laboratory specialist · 21 October 2026
What it measures
A complete blood count (CBC) is one of the most commonly requested blood tests. It gives a general picture of the main parts of your blood:
- Red blood cells and hemoglobin, which carry oxygen around the body.
- White blood cells, part of the immune system. A count of the different types is usually included.
- Platelets, which help blood clot and stop bleeding.
- Other measures, such as the size of the red cells and the share of the blood they take up (hematocrit).
Why a doctor may order it
Your doctor may request a CBC for many reasons, for example:
- A routine checkup, or a check before surgery or a procedure.
- Tiredness, dizziness or paleness, to look for anemia.
- Signs of an infection or inflammation.
- Bruising or bleeding without a clear cause.
- Follow-up of a long-term condition or a treatment that can affect the blood.
Preparation and fasting
A CBC usually needs no fasting. You can eat and drink normally beforehand. If your doctor ordered other tests at the same time that do need fasting, such as fasting blood sugar or a lipid profile, follow the fasting instructions for those.
Tell us if you take any medicines or have been unwell recently. We confirm the preparation with you on WhatsApp before your appointment.
Sample type
A small blood sample from a vein, usually in your arm. It goes into a tube with an additive that stops it clotting. Our technician takes it at your home.
About your results
Your results reach you on WhatsApp. Discuss them with the doctor who ordered the test, who can explain them in light of your health.