BDNF (Brain-Derived Neurotrophic Factor)

Neurological

Neurotrophic Factors

pg/mL

Brain-derived neurotrophic factor (BDNF) is a growth factor that supports neuron survival, synaptic plasticity, and the birth of new neurons, sometimes called fertilizer for the brain. A longevity practice tracks it because low levels are linked to depression, cognitive decline, and accelerated brain aging.

What It Measures

Growth factor that supports neuron survival, synaptic plasticity, and neurogenesis; "fertilizer for the brain"

Optimal vs. Lab Range

Longevity Optimal

Upper quartile for method

Target range for optimal health and longevity based on research.

Standard Lab

Varies by assay (serum)

Population-based reference range from standard labs.

Why It Matters

BDNF is the master neurotrophin supporting neuronal survival, synaptic plasticity, hippocampal neurogenesis, and mood regulation. Low levels are linked to depression, cognitive decline, and accelerated brain aging.

When Low

Cognitive decline, depression, Alzheimer risk, anxiety, reduced neuroplasticity, accelerated brain aging

When High

Generally favorable when high (exercise-induced elevation is protective)

How to Optimize

Aerobic exercise (especially zone 2 + HIIT), resistance training, intermittent fasting, quality sleep, sun/cold exposure, learning novel skills, social engagement, omega-3 (DHA), curcumin, and adequate protein intake.

Key Interventions & Linked Compounds

Moderate evidence

Key Interventions

Exercise (strongest BDNF elevator)

meditation

sunlight

omega-3

intermittent fasting

lion's mane

Linked Compounds & Supplements

Lion's Mane

Omega-3

Curcumin

Lithium (low-dose)

Alpha-GPC

Bacopa

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

Semi-annual

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 BDNF (Brain-Derived Neurotrophic Factor).
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.