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Ginkgo Biloba

Ginkgo biloba

Ancient-tree extract marketed for memory.

Mixed evidence ☯️TCM Herb🧠Nootropic⏳Longevity

✚ Updated · How we grade evidence

Evidence tier
Mixed
Research weight
Citations
17 verified / 17
Classification
TCM Herb
❝
What the evidence says. Conflicting results across studies; benefit uncertain.

What is Ginkgo Biloba?

Ginkgo Biloba (Ginkgo biloba) is a traditional Chinese medicine herb used for possible cognition in dementia. NutriDex grades the human evidence as Mixed. Ginkgo extract improves microcirculation and has antioxidant effects. Evidence is genuinely mixed: it does NOT prevent cognitive decline or dementia in healthy older adults (large GEM trial), but some trials suggest modest symptomatic benefit in existing dementia. Claims for memory enhancement in healthy people are largely unsupported.

Purported Benefits

✓Possible cognition in dementia
✓Circulation
✓Tinnitus (weak)

Evidence by outcome

The same supplement can be well-proven for one use and unproven for another — here is the human evidence graded outcome by outcome.

OutcomeEvidenceEffectStudies
Symptomatic cognition in established dementiaMultiple MAs of EGb 761 240 mg/day show small benefit (SMD ~-0.5) on cognition/ADL in existing dementia. Moderate ↑ benefit · small 4
Prevention of dementia / cognitive declineLarge GEM RCT (n>3,000, 6 yr) found no slowing of decline or dementia prevention in healthy elders. Strong — no effect · negligible 2
Memory in healthy adultsRCT and NCCIH agree no memory benefit in cognitively healthy people. Moderate — no effect · negligible 1
TinnitusCochrane (12 RCTs) found little or no effect when tinnitus is the primary complaint. Moderate — no effect · negligible 2
Intermittent claudication / circulationCochrane found only ~64 m walking-distance gain — not clinically significant for peripheral arterial disease. Moderate — no effect · negligible 1

Dosing & Compounds

Typical Dose
120–240 mg/day standardized extract (EGb 761).
Active Compounds
Flavone glycosidesTerpene lactones

Safety & Cautions

Generally safe. Increases bleeding risk — stop before surgery and avoid with anticoagulants. Educational only — always check with your doctor or pharmacist before combining Ginkgo Biloba with any medicine.

Ginkgo Biloba drug interactions

Known or theoretical interactions between Ginkgo Biloba and common medications — educational, not exhaustive. Always check with your doctor or pharmacist before combining Ginkgo Biloba with any medicine.

Caution
Warfarin, aspirin & antiplatelets
Ginkgo may increase bleeding risk, with case reports of serious bleeding alongside blood thinners.
Ginkgolides inhibit platelet-activating factor and aggregation, adding to antiplatelet/anticoagulant effects. NIH NCCIH — Ginkgo

Key Studies ★ 17 studies

meta-analysis Xie 2023 meta-analysis ✓ PubMed
In a meta-analysis of 18 RCTs (1,642 patients with Alzheimer's disease), Ginkgo biloba added to donepezil improved MMSE by a mean of 3.02 points (95% CI 2.14-3.89) versus donepezil alone, with similar adverse-event rates.
meta-analysis Riepe 2025 subgroup meta-analysis ✓ PubMed
Pooled data from 4 RCTs (782 patients with mild dementia) showed 240 mg/day EGb 761 was significantly superior to placebo in cognition (p=0.04), global assessment (p=0.01), activities of daily living (p=0.01) and quality of life (p=0.02), with adverse events comparable to placebo.
meta-analysis EGb 761 cerebral-infarction meta-analysis 2025 ✓ Full text
Meta-analysis of 4 placebo-controlled RCTs (488 patients with dementia and prior cerebral infarction) found 240 mg/day EGb 761 modestly improved cognition (MD -2.42, p=0.047), activities of daily living (SMD -0.65) and global assessment (SMD -0.79), with safety comparable to placebo.
Systematic review Barbalho 2024 ✓ PubMed
Systematic review of clinical trials concluded Ginkgo biloba (notably EGb 761) shows neuroprotective, anti-inflammatory and antioxidant effects and cognitive/functional benefit in Alzheimer's dementia, especially in patients with neuropsychiatric symptoms.
Meta-analysis Feng 2026 (Front Neurol) ✓ PubMed
Pooled analysis of 4 RCTs (n=488) in mild-to-moderate dementia patients with neuroimaging-confirmed prior cerebral infarction: EGb 761 240 mg/day significantly improved cognition (p=0.047), activities of daily living (p=0.023) and global clinical impression (p=0.037) vs placebo, with adverse-event rates similar to placebo.
Cochrane systematic review Sereda 2022 Cochrane review (tinnitus) ✓ PubMed
A Cochrane systematic review of 12 RCTs (1,915 participants) found that Ginkgo biloba probably has little or no effect on tinnitus severity, loudness or tinnitus-related quality of life when tinnitus is the primary complaint, with no clear evidence of benefit over placebo.
Meta-analysis Savaskan 2018 ✓ PubMed
Meta-analysis of 4 RCTs (n=1,628) in dementia patients with clinically significant neuropsychiatric symptoms (NPI >=6): EGb 761 240 mg/day for 22-24 wk significantly improved total NPI and 10 of 12 individual behavioral/psychological symptoms plus caregiver distress vs placebo (except psychotic-like features).
Systematic review Kramer & Ortigoza 2018 ✓ PubMed
GRADE-based summary of 3 systematic reviews (4 RCTs): Ginkgo biloba probably does NOT decrease tinnitus severity or intensity, nor improve quality of life - evidence does not support use for tinnitus.
Meta-analysis Weinmann 2010 meta-analysis ✓ PubMed
Modest symptomatic benefit in existing dementia.
Cochrane systematic review Nicolaï 2013 Cochrane review (intermittent claudication) ✓ PubMed
A Cochrane systematic review of 14 trials (739 participants, 11 placebo-controlled trials in 477) found Ginkgo biloba increased pain-free walking distance by only about 64.5 metres versus placebo, concluding there is no clinically significant benefit for peripheral arterial disease.
Meta-analysis Gauthier & Schlaefke 2014 ✓ PubMed
Meta-analysis of 7 RCTs (n=2,625) of EGb 761 120-240 mg/day for 22-26 wk in established dementia: significant benefit over placebo for cognition (SMD -0.52, 95% CI -0.98 to -0.05), activities of daily living (SMD -0.44, 95% CI -0.68 to -0.19) and global rating (SMD -0.52); tolerability comparable to placebo.
randomized controlled trial Zhang 2023 post-stroke pilot RCT ✓ PubMed
In a multicenter open-label pilot RCT of patients after acute ischemic stroke (China, 7 centers), 240 mg/day EGb 761 added to standard care promoted greater MoCA cognitive improvement at 6 months versus standard care alone.
Government health agency statement NCCIH Ginkgo health statement (NIH) ✓ Source
The U.S. National Center for Complementary and Integrative Health states ginkgo has not been shown to prevent or slow dementia and its cognitive benefit in healthy people is uncertain, and warns it may increase bleeding risk, especially with anticoagulants such as warfarin.
RCT Snitz 2009 (GEM trial, JAMA) ✓ PubMed
Pre-specified GEM analysis (n=3,069, 6.1y): G. biloba 120 mg twice daily did NOT slow cognitive decline in any domain (memory, attention, visuospatial, language, executive) vs placebo; no benefit even in MCI subgroup. Establishes lack of efficacy for primary cognitive-decline prevention.
Observational Bohlken 2025 ✓ PubMed
Retrospective real-world cohort (n=4765 dementia patients, up to 10-year follow-up) found Ginkgo biloba extract prescription associated with significantly lower risk of dementia-severity progression (HR 0.50; 95% CI 0.27-0.95; cumulative progression 12.7% vs 22.1%).
Study GEM Study 2008 ✓ PubMed
No reduction in dementia incidence in healthy older adults.
Study Solomon 2002 ✓ PubMed
No memory benefit in healthy adults.
17 sources cited · 17 verified Search all studies on PubMed ↗

Common questions about Ginkgo Biloba

What is Ginkgo Biloba used for?

Ginkgo Biloba is most often taken for Possible cognition in dementia, Circulation, Tinnitus (weak). Ancient-tree extract marketed for memory.

Does Ginkgo Biloba work — what does the evidence say?

Mixed evidence. Conflicting results across studies; benefit uncertain. Ginkgo extract improves microcirculation and has antioxidant effects. Evidence is genuinely mixed: it does NOT prevent cognitive decline or dementia in healthy older adults (large GEM trial), but some trials suggest modest symptomatic benefit in existing dementia. Claims for memory enhancement in healthy people are largely unsupported.

What is the typical dose of Ginkgo Biloba?

120–240 mg/day standardized extract (EGb 761).

Is Ginkgo Biloba safe? Any cautions or side effects?

Generally safe. Increases bleeding risk — stop before surgery and avoid with anticoagulants.

How many studies support Ginkgo Biloba?

NutriDex cites 17 sources for Ginkgo Biloba, graded "Mixed".

Does Ginkgo Biloba interact with any medications?

Yes — known or theoretical interactions include: Antiplatelet drugs (aspirin, clopidogrel) (caution). This is educational and not exhaustive; always check with your doctor or pharmacist before combining Ginkgo Biloba with any medicine.

Cite this page
APA

Peh, D. (2026). Ginkgo Biloba (Ginkgo biloba): Benefits, Dosage, Side Effects & Evidence. NutriDex — The Supplement Research Compendium. Retrieved 26 Jun 2026, from https://nutridex.info/s/ginkgo

BibTeX
@misc{nutridex_ginkgo,
  author       = {Peh, Daryl},
  title        = {Ginkgo Biloba (Ginkgo biloba): Benefits, Dosage, Side Effects \& Evidence},
  year         = {2026},
  howpublished = {NutriDex --- The Supplement Research Compendium},
  url          = {https://nutridex.info/s/ginkgo},
  note         = {Reviewed by Dr Daryl Peh, MBBS Singapore, MMed FM. Accessed 2026-06-26}
}

For medical claims, citing the underlying primary studies linked above is preferred. NutriDex is an educational reference, not medical advice.

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