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meta analysis2,561 participants

Ginkgo Biloba for Cognition & Dementia: What the Meta-Analysis Shows

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A 2015 meta-analysis (9 trials, 2,561 patients) found standardized ginkgo biloba extract (EGb761, 240 mg/day) was...

A 2015 meta-analysis (9 trials, 2,561 patients) found standardized ginkgo biloba extract (EGb761, 240 mg/day) was associated with improved cognition in people with existing cognitive impairment or dementia. Importantly, large trials found ginkgo does NOT prevent dementia in healthy older adults — so its studied benefit is in those already affected, and it should be used with clinician guidance.

Key Findings

  • Across 9 trials (2,561 patients with cognitive impairment or dementia), standardized ginkgo (EGb761) was associated with improved cognition versus placebo (weighted mean difference −2.86 favoring ginkgo).
  • Benefit was clearer at the higher 240 mg/day dose of EGb761.
  • Evidence applies to people who already have cognitive impairment or dementia — not to healthy adults seeking general 'brain' support.
  • Large prevention trials found ginkgo did NOT prevent dementia in healthy older adults, so it should not be used for that purpose.

Study Details

Efficacy and adverse effects of ginkgo biloba for cognitive impairment and dementia: a systematic review and meta-analysis
Tan MS, Yu JT, Tan CC, Wang HF, Meng XF, Wang C, Jiang T, Zhu XC, Tan L — Journal of Alzheimer's Disease (2015)
Standardized ginkgo (EGb761, 240 mg/day) was associated with improved cognition (WMD −2.86) in patients with cognitive impairment or dementia.
2,561 participantsModerate

Practical Takeaway

Standardized ginkgo biloba extract (EGb761) has been studied for supporting cognition in people who already have cognitive impairment or dementia, where meta-analysis links it to modest improvement — most clearly at 240 mg/day. It should not be taken to 'prevent dementia': large trials found no preventive benefit in healthy older adults. Ginkgo can thin the blood and may add to the effect of anticoagulant or antiplatelet medications, so anyone on those drugs, or facing surgery, should consult a clinician. This is supportive information, not a substitute for medical evaluation of memory or cognitive concerns.

Summary

A meta-analysis found standardized ginkgo biloba extract was associated with cognitive benefits in people who already have cognitive impairment or dementia — not as a way to prevent dementia.

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Ginkgo Biloba

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Frequently Asked Questions

Does ginkgo biloba help memory and cognition?

A meta-analysis found standardized ginkgo (EGb761, 240 mg/day) was associated with improved cognition in people who already have cognitive impairment or dementia. The evidence is not for healthy adults seeking a general memory boost.

Can ginkgo prevent dementia or Alzheimer's?

No. Large prevention trials found ginkgo did not prevent dementia in healthy older adults. Its studied benefit is in people who already have cognitive impairment, so it should not be taken as a dementia-prevention strategy.

What dose and form of ginkgo was studied?

The evidence centers on standardized extract EGb761 at 240 mg/day. Standardization matters, since unstandardized products can vary widely in their content.

Is ginkgo safe to take?

Ginkgo can thin the blood and may add to the effects of anticoagulant or antiplatelet medications, raising bleeding risk. If you take such medications or are scheduled for surgery, consult a clinician before using ginkgo, and discuss any memory concerns with a healthcare professional.

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Supplement Guide

Ginkgo Biloba

Bottom line: Ginkgo has moderate evidence for cognitive support in older adults. Take 120-240mg EGb 761 daily — results are modest but consistent across European clinical trials.

Condition Guide

Brain Fog & Focus

References

  1. Tan MS, Yu JT, Tan CC, Wang HF, Meng XF, Wang C, Jiang T, Zhu XC, Tan L (2015). Efficacy and adverse effects of ginkgo biloba for cognitive impairment and dementia: a systematic review and meta-analysis. Journal of Alzheimer's Disease. DOI PubMed