Condition
    Strong Evidence
    Effectiveness 1/5

    Ginkgo Biloba for Memory Loss

    Ginkgo failed to prevent cognitive decline in the largest trial ever run on it. The marketing has outlived the evidence.

    Overview

    Ginkgo failed to prevent cognitive decline in the largest trial ever run on it. The marketing has outlived the evidence.

    Verdict

    Insufficient evidence

    Not recommended for age-related forgetfulness. The best-quality evidence is negative, and it interacts with blood thinners.

    How It Works

    Ginkgo biloba extract contains flavonoid glycosides and terpene lactones proposed to increase cerebral blood flow, scavenge free radicals and inhibit platelet-activating factor.

    Dosing & Protocol

    Typical dose

    Recommended dose
    Not recommended; trial doses were 120mg twice daily of standardised EGb 761
    Expected timeframe
    No meaningful timeframe — six years of use showed no benefit

    Protocol

    form
    The best-studied preparation is EGb 761, standardised to 24% flavone glycosides and 6% terpene lactones
    duration
    Trials ran up to 6 years without separating from placebo in healthy memory
    co factor
    Address the common reversible causes instead: sleep debt, untreated hearing loss, alcohol, anticholinergic medication, low B12 and thyroid dysfunction
    titration
    No titration is justified — higher doses did not improve outcomes and increase bleeding risk
    starting dose
    Not recommended. Trials used 120 mg standardised EGb 761 twice daily (240 mg total) in healthy adults and found no meaningful memory benefit over placebo

    Evidence

    What the studies say

    The Ginkgo Evaluation of Memory study randomised 3,069 adults aged 75 and over to 120mg twice daily and followed them for a median of six years, finding no reduction in dementia incidence and no slowing of cognitive decline. Earlier positive trials were smaller, shorter and largely industry-funded. Cochrane reviews conclude the evidence for benefit in cognitive impairment is inconsistent and unconvincing. This is one of the clearest cases where a large, well-powered trial should settle the question.

    Ginkgo biloba for prevention of dementia: a randomized controlled trial

    Score: 9/10
    2008
    rct
    n=3069

    DeKosky ST, et al

    G. biloba at 120 mg twice a day was not effective in reducing either the overall incidence rate of dementia or AD incidence in elderly individuals with normal cognition or those with MCI.

    View source

    Comparative effects of Bacopa monnieri and Ginkgo biloba on cognitive functions: A systematic review and network meta-analysis

    Score: 7/10
    2026
    meta_analysis
    n=2107

    Tiemtad P, et al.

    Brahmi, particularly in high-dose formulations, shows promise as a cognitive enhancer compared to Ginkgo in healthy adults.

    View source

    Ginkgo biloba for preventing cognitive decline in older adults: a randomized trial

    Score: 9/10
    2009
    rct
    n=3069

    Snitz BE, O'Meara ES, Carlson MC +3 more

    Compared with placebo, the use of G. biloba, 120 mg twice daily, did not result in less cognitive decline in older adults with normal cognition or with mild cognitive impairment.

    View source

    Ginkgo biloba for cognitive impairment and dementia (updated review)

    Score: 8/10
    2026
    systematic_review

    Cochrane Dementia and Cognitive Improvement Group

    It remains uncertain whether Ginkgo is better than placebo for improving overall cognitive condition at six months; certainty of evidence was low to very low.

    View source

    Safety

    Caveats

    Increases bleeding risk with warfarin, DOACs, aspirin and NSAIDs. Case reports of spontaneous bleeding. Can lower seizure threshold, so avoid in epilepsy.

    Less likely to help if

    Effectively everyone with age-related memory complaints, based on the GEM trial result.

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