Glucose-6-phosphate dehydrogenase (G6PD)
Private G6PD Blood Test in London for £108, measuring G6PD enzyme activity with secure results delivered by email in 2–3 days.
Turnaround time
2-3 days
Biomarkers count
1
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Overview of the G6PD Blood Test
The Glucose-6-phosphate dehydrogenase (G6PD) Blood Test measures the activity of the G6PD enzyme, which helps protect red blood cells from oxidative damage. G6PD plays an essential role in maintaining healthy red blood cells and supporting their normal function throughout their lifespan.
This is a single-biomarker enzyme test that measures G6PD. The test is commonly requested to investigate suspected G6PD deficiency, an inherited condition that can increase the risk of red blood cell breakdown (haemolysis) following exposure to certain medicines, foods or infections. It may also be used before prescribing specific medications or as part of investigations into unexplained haemolytic anaemia.
People may choose this test if they have a family history of G6PD deficiency, unexplained episodes of anaemia, jaundice, dark urine following illness or medication use, or if a healthcare professional recommends screening before treatment with medicines known to affect people with G6PD deficiency.
The G6PD Blood Test provides important laboratory information but does not diagnose a medical condition on its own. Results should always be interpreted alongside symptoms, medical history, ethnicity, family history, medications and other laboratory findings by a suitably qualified healthcare professional.
What Does the G6PD Blood Test Check ?
G6PD - Glucose-6-phosphate dehydrogenase (G6PD) is an enzyme found within red blood cells that helps protect them from oxidative stress. Measuring G6PD activity helps determine whether the enzyme is functioning normally and may support the investigation of inherited G6PD deficiency or unexplained haemolysis when interpreted alongside clinical findings.
Who May Benefit From the G6PD Blood Test?
This test may be suitable for people who want to:
Investigate suspected G6PD deficiency when symptoms or family history suggest reduced enzyme activity.
Assess unexplained haemolytic anaemia to help identify whether red blood cell breakdown may be linked to G6PD activity.
Review a family history of G6PD deficiency, especially if relatives have had confirmed enzyme deficiency or haemolytic episodes.
Support investigations following episodes of jaundice, particularly when yellowing of the skin or eyes occurs after illness or medication.
Assess enzyme activity before certain medications are prescribed, especially treatments known to trigger haemolysis in susceptible people.
Investigate unexplained dark urine following illness or medication, which may indicate red blood cell breakdown.
Monitor G6PD status where clinically appropriate, such as during ongoing specialist review or repeat assessment.
Obtain specialist laboratory information before consulting a haematologist, so your clinician has useful results to review.
Arrange a private blood test in London without waiting for a GP referral, offering a quicker route to testing.
Check suitability before travel or treatment abroad if you may need documentation of G6PD status for medical planning.
How to Prepare
How to Book Your G6PD Blood Test in London
Booking your G6PD Blood Test with London Blood Tests is simple and designed to fit around your schedule.
Choose the G6PD Blood Test
Select the G6PD Blood Test online and review the included biomarkers before booking.
Select your sample collection option
Choose a London clinic appointment or request a home visit, depending on availability and location.
Attend your appointment
A trained professional will collect your blood sample safely and efficiently.
Laboratory analysis
Your sample is analysed at an accredited laboratory where G6PD enzyme activity is measured using validated laboratory methods.
Receive your results securely
Your results are sent securely by email, ready to review yourself or discuss with a GP, specialist or qualified clinician.
When Will I Receive My Results?
Results are typically available within 2–3 days after the laboratory receives your sample.
Once authorised by the laboratory, your report will be sent securely by email.
Turnaround times begin when the laboratory receives your sample rather than when it is collected. Specialist enzyme testing may occasionally require additional laboratory processing. Results outside the expected range should be reviewed with a GP, haematologist or other suitably qualified healthcare professional.
Understanding Your Results
Your report will include your G6PD enzyme activity together with the laboratory reference range.
Reference ranges and testing methods may vary slightly between laboratories. A result within the reference range does not always exclude every cause of haemolysis, while a reduced result does not automatically confirm the cause of symptoms without further clinical assessment.
Results should always be interpreted alongside symptoms, medical history, ethnicity, family history, medications, recent illnesses and any additional blood test findings. If you have concerns regarding your results, discuss them with your GP or haematologist.
Why Book With London Blood Tests?
Private enzyme testing in London
Clinic blood draw appointments available (+£35)
Home and hotel phlebotomy visits available (+£60)
Specialist haematology and inherited enzyme testing
Secure laboratory results delivered by email
Transparent pricing before booking
Convenient appointment scheduling
Support with choosing the appropriate blood test
Private G6PD Blood Test in London
At London Blood Tests, we provide private G6PD Blood Tests with fast access to accredited laboratory testing.
Clinic appointments are available alongside home visit options depending on your location and testing requirements. This makes it easy to arrange a private blood test near you with flexible sample collection.
Whether you are investigating suspected G6PD deficiency, reviewing a family history or obtaining laboratory information before discussing your results with a GP or specialist, our service provides reliable testing, secure reporting and convenient appointments.