GFAP (Glial Fibrillary Acidic Protein)
Glial fibrillary acidic protein (GFAP) is released when astrocytes, the brain's support cells, become activated by injury or disease. A preventive practice tracks this emerging blood marker because elevations accompany Alzheimer's disease, brain injury, and neuroinflammation.
What It Measures
Astroglial activation marker.
Optimal vs. Lab Range
Target range for optimal health and longevity based on research.
Population-based reference range from standard labs.
Why It Matters
Elevated in AD, TBI, neuroinflammation.
When Low
—
When Optimal
Low → no significant astrogliosis.
When High
Elevated → neuroinflammation/injury; workup.
How to Optimize
Address neuroinflammation drivers; Mediterranean diet, exercise.
Key Interventions & Linked Compounds
Strong (7/10)Key Interventions
Linked Compounds & Supplements
Curated from clinical literature. Individual results vary; consult a qualified clinician before changing a protocol.
Ordering Notes
Specimen
Serum or plasma (venous draw)
Patient prep
No fasting required. Maintain usual diet and medications unless advised.
Recommended cadence
Re-test every 3–6 months when actively optimizing; annually for monitoring.
Reporting unit
pg/mL
Pre-analytic notes
Standardize draw time of day, hydration, and recent exercise. Note any acute illness, supplements, or hormonal therapies on the requisition.
Recommended Follow-Up Actions
- 1
Confirm the result is reliable
Repeat abnormal values before acting — preferably from the same lab, same time of day, and under consistent prep. Rule out acute illness, recent intense exercise, or medication effects that can shift GFAP (Glial Fibrillary Acidic Protein).
- 2
Compare against optimal, not just lab range
Use the optimal window above as the target. Lab "normal" is built from the general population and often misses early dysfunction.
- 3
Pair with related markers
Order a complementary panel covering metabolic, inflammatory, and hormonal context to interpret this marker properly.
- 4
Discuss interventions with a clinician
Use the interpretation guidance above to frame the conversation. Bring trends, not just one datapoint, to your visit.
- 5
Re-test on a defined cadence
If a change is implemented, re-measure in 8–12 weeks for fast-moving markers, or 3–6 months for slower ones, to confirm response before escalating.
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