Ginkgo biloba and dementia risk
What 2 graded rows on ginkgo biloba agree on for dementia risk, and where they differ. Counted side by side, never averaged.
Consensus finder Rows from the Ginkgo biloba page, reviewed Oct 21, 2026 How it decides
What the rows agree on
Each block and row is one graded row from the Ginkgo biloba page, with its PubMed record.
Your question
Ginkgo biloba and dementia risk
2 rows · 5,923 peopleThey agree: both rows found no difference.
- ∅No effect× 2
- Rows
- 2
- Trials
- 2
- People
- 5,923
What the rows share
From the rowsEvery row is graded No effect, our grade for adequately powered trials that found no effect.
The rows run from 2,854 to 3,069 people, published from 2008 to 2012: 2 single studies.
The rows
2 no difference- ∅No effectIncident dementia in older adults · No difference
RCT · n 3,069 · 2008 · Adults aged 75+ with normal cognition or MCI
120 mg twice daily · Median about 6 years
Dementia and Alzheimer incidence did not differ from placebo.
Row on the Ginkgo biloba page · PubMed 19017911 (opens PubMed)
- ∅No effectProgression to Alzheimer disease · No difference
RCT · n 2,854 · 2012 · Adults aged 70+ with memory complaints
120 mg twice daily · 5 years
Long-term use did not reduce progression to Alzheimer disease versus placebo.
Row on the Ginkgo biloba page · PubMed 22959217 (opens PubMed)