Research synthesisModerate evidenceSmall effect7 studies · 5 beneficial · 2 neutral · 0 harmful
Across 7 studies, 5 reported beneficial effects on cognitive function, predominantly small in magnitude, while 2 found neutral effects. The highest-quality study (a systematic review of 3,582 elderly participants) found no significant benefit, however. Effects were most consistently observed in clinical populations (e.g., dementia, post-stroke cognitive impairment) with doses around 240 mg/day of EGb 761 extract, typically over 8–12 weeks.
- Effective dose range: 240 mg daily of EGb 761 extract
- Studied populations: older adults with cognitive impairment or dementia, including post-stroke and Parkinson's disease patients
Caveats: The most robust study (systematic review with 3,582 participants) found no significant effect, casting doubt on the overall benefit. Most beneficial studies were in clinical populations with specific conditions, so results may not generalize to healthy individuals. Only one study specified a dose (240 mg/day of EGb 761); other studies did not report dose. Median study duration was 70 days, but only 2 of 7 studies reported duration. One beneficial study combined Ginkgo with Cistanche, so the effect may not be attributable to Ginkgo alone.
Generated Jul 11, 2026