Archive · 25 Sep 2025
Blood Test Could Predict Brain Disease Years Before Symptoms
Imagine a blood test that could spot brain problems before you even feel sick.
This test looks for tiny bits of damaged nerve cells in your blood, called NfL.
If NfL levels are high, it means your brain might be getting damaged, possibly from conditions like Alzheimer's or Parkinson's.
This test isn't a sure diagnosis but can be a warning sign.
Doctors can use it with other tests to see what's going on.
The test is simple, just a blood draw, and it's available but not for everyone.
Talk to your doctor if you're at risk or have a family history of neurological disease.
NfL test may detect brain damage years before symptoms appear.
Elevated NfL levels linked to Alzheimer's, Parkinson's, and other conditions.
The test measures NfL fragments released by damaged nerve cells.
NfL tests involve a simple blood draw and are available commercially.
Doctors use NfL results with other tests for broader assessment.
- Who
- Neurosurgeon Dr. Jay Jagannathan and Dr. Jagdish Chattnalli
- What
- A blood test to detect brain damage before symptoms appear.
- When
- No specific date mentioned, but it is a current topic.
- Where
- Bengaluru West Clinics, HCG Hospitals Bengaluru.
- Why
- To identify potential neurological issues early for better management.
- Test Name
- Neurofilament Light Chain (NfL) test
- What it Measures
- NfL protein fragments (nerve cell damage)
- Purpose
- Predict brain diseases before symptoms appear
- Method
- Simple blood draw
- Conditions Linked
- Alzheimer’s, Parkinson’s, MS, stroke, TBI
- Availability
- Offered by commercial labs, not for routine screening
- Expert Advice
- Consult a doctor for interpretation