Research synthesisModerate evidenceMixed effect size4 studies · 4 beneficial · 0 neutral · 0 harmful
In all 4 studies, Ginkgo biloba showed beneficial effects on activities of daily living, with effect sizes ranging from small to moderate. The most-studied dose is 240 mg daily, and effects were observed primarily in clinical populations with dementia or cognitive impairment. Median study duration was approximately 19 weeks, suggesting benefits typically appear after several months of use.
- Effective dose range: 240 mg daily
- Studied populations: people with dementia (including mild to moderate, post-cerebral infarction) and Parkinson's disease
Caveats: Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Additionally, most studies used the standardized EGb 761 extract at 240 mg daily in dementia populations; effects in healthy adults or with other formulations are uncertain. One study was retrospective and observational, limiting causal inferences.
Generated Jul 14, 2026