G6PD is an important enzyme that helps protect red blood cells from damage. A deficiency in G6PD can lead to episodes of red blood cell breakdown (haemolysis), which may cause anaemia, jaundice, and fatigue, particularly after exposure to certain medications, infections, or foods. This test helps diagnose G6PD deficiency, a genetic condition that is more common in certain ethnic groups.




G6PD (Glucose 6 phosphate dehydrogenase) Blood Test
- Results estimated in 6 working days
- Convenient testing options
- Bespoke doctor’s report
- Free delivery
Measures G6PD enzyme activity to assess red blood cell function and the risk of haemolytic anaemia.
How do you want to take your sample?
Please choose one option below-
Book a venous draw at a clinic Venous+£35Visit one of our national clinic partners for a nurse to take your venous blood sample from a vein in your arm. We’ll email you instructions on how to book after we’ve processed your order.
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Book a venous draw at home with a nurse Venous+£59Book a home nurse appointment for a nurse to take your venous blood sample from a vein in your arm.
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Self-arrange a professional sample collection VenousFreeMake an appointment at a phlebotomy clinic to have your venous blood sample taken. You will be responsible for arranging your appointment and any additional fees.
18+ Only. T&Cs apply.
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How it works
You have the flexibility to choose what works best for you. Enjoy the comfort of having a friendly nurse visit your home for a quick blood draw, opt for a convenient visit to one of our nationwide partner clinics, or self-arrange a draw at a location that suits you.
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Dr Natasha Fernando
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What's in the test?
Metabolic disorders
G6PD activity
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How to prepare for your test
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FAQs
What does G6PD do?
G6PD helps the red blood cells to function normally. G6PD also helps protect red blood cells against substances that can build up when you have a fever or take certain medicines.
What could a low G6PD result mean?
If there is not enough G6PD to protect the red cells, some may be destroyed during fever or while taking these medicines. This is called haemolysis and may be associated with jaundice. If this happens, you may not have enough red blood cells and may become anaemic.
What is G6PD?
G6PD, glucose 6 phosphate dehydrogenase, is a chemical found in red blood cells which carry oxygen to all parts of your body.