Ginkgo biloba for Age-Related Cognitive Decline
CThe most studied herbal cognitive supplement. The large GEM trial (3,069 participants) found no evidence for dementia prevention in healthy elderly. However, EGb 761 standardized extract shows modest benefits in existing cognitive impairment.
The Bottom Line
The most studied herbal cognitive supplement. The large GEM trial (3,069 participants) found no evidence for dementia prevention in healthy elderly. However, EGb 761 standardized extract shows modest benefits in existing cognitive impairment.
Key Study Findings
Population: patients with mild-to-moderate Alzheimer disease or vascular dementia
Population: patients with vascular cognitive impairment and dementia
Population: Review of natural products for neuroprotection
Population: Multiple sclerosis patients (review)
Population: Rural populations with dementia risk
Population: Amyloid PET-positive MCI patients
Key Statistics
40
Studies
8000
Participants
Mixed
Grade
Referenced Papers
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Commonly Used Dosages
- general:
- 120-240 mg/day standardized to 24% flavone glycosides and 6% terpene lactones
Upper limit: 600 mg/day (doses above show no additional benefit)
Dosages Studied in Research
| Dosage | Duration | Effect | N |
|---|---|---|---|
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| 240 mg/day | 52 weeks | Positive | 64 |
| None | -- | Positive | -- |
| None | -- | Neutral | -- |
Best taken: With meals; may require 4-6 weeks for full effects
Safety & Side Effects
Reported Side Effects
- ⚠ Headache
- ⚠ Gastrointestinal upset
- ⚠ Dizziness
- ⚠ Allergic skin reactions (rare)
- ⚠ Increased bleeding risk
Known Interactions
- ● Anticoagulants and antiplatelet drugs (increased bleeding risk)
- ● Anticonvulsants (may reduce seizure threshold)
- ● SSRIs (serotonin syndrome risk, rare)
- ● CYP3A4 substrates (may affect drug metabolism)
Tolerable upper intake: 600 mg/day (doses above show no additional benefit)
Always consult your healthcare provider before starting any supplement.
Frequently Asked Questions
Does Ginkgo biloba help with Age-Related Cognitive Decline?
How much Ginkgo biloba should I take for Age-Related Cognitive Decline?
Are there side effects of Ginkgo biloba?
How strong is the evidence for Ginkgo biloba and Age-Related Cognitive Decline?
Related Evidence
Other ingredients for Age-Related Cognitive Decline
Ginkgo biloba for other conditions
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.