GFAP blood test in Chiswick

What the test measures

GFAP is a structural protein found mainly in astrocytes, the star-shaped cells that support and protect nerve cells in the brain and spinal cord. When these cells are damaged, GFAP can pass into the blood. Interest in blood GFAP has grown because it may help assess brain injury, and it has been studied in conditions such as concussion, stroke, multiple sclerosis and dementia.

Despite that interest, GFAP is an emerging marker. In some countries, blood tests that include GFAP have been approved to help decide whether a brain scan is needed after a mild head injury, but it is not a routine screening test, and there is limited evidence for using it on its own in people without symptoms. Its main role is as a specialist marker read with other tests and a clinical assessment.

The price includes your sample at our Chiswick clinic, analysis at the Randox accredited laboratory, a review of your result with an Omnia practitioner, and a GP feedback report on request.

Who it is for

• A specialist has asked for GFAP as part of ongoing monitoring.
• You are having a broad health review that includes research markers and understand their limits.
• You are following up a neurological concern with a practitioner and want additional context.
• You would like to discuss what emerging brain health markers can and cannot show.

Understanding your result

Your report shows your GFAP level with the laboratory reference range. Levels can rise with age and vary between people, and ranges for this marker are still being refined. A raised level may be seen after injury or with some neurological conditions, but it is not specific and cannot point to a single cause.

A result outside the range is a starting point for conversation, not a diagnosis. Your practitioner will explain what is known about the marker and whether review by your GP or a neurologist would help. Anyone with a head injury who has vomiting, drowsiness, confusion, a severe headache or weakness should call 999 or go to A&E, not book a test.

Preparing for your test

You do not need to fast for this test, and you can take your usual medicines. If a specialist has requested the test with a particular timing, follow their advice and let us know when you book. We confirm any preparation at that point.

For established markers of general health, the Standard Screen is a sensible place to start, and GFAP is included among the wide range of markers in Omnia Signature. Check every blood test and price in Chiswick as well.

Questions

How much is a GFAP blood test in Chiswick?

The GFAP blood test costs £129 at Omnia Lifestyle. This includes your blood sample at our Chiswick clinic, analysis at the Randox accredited laboratory, a practitioner review and a GP feedback report on request.

Can GFAP diagnose dementia or multiple sclerosis?

No. GFAP has been studied in these conditions, but diagnosis relies on clinical assessment, imaging and other specialist tests.

Should I have this after a head injury?

Not as a substitute for medical care. If you have symptoms after a head injury, call 999 or attend A&E, where the right assessment and scans can be arranged.

Is GFAP useful as a general check-up?

Its value as a stand-alone screen in healthy people is limited. It is best used with other tests where there is a specific question.