How can Ginkgo biloba affect dementia?

Ginkgo may alleviate some symptoms of brain deterioration (dementia). Most well-designed clinical studies show that ginkgo improves symptoms in patients who are suffering from the kind of dementia that is due to impaired blood supply to the brain.

In the largest recent clinical trials among patients with dementia of the Alzheimer's type or dementia that is due to multiple areas of cell death in the brain (multi-infarct type), the extract of Ginkgo biloba (EGb 761) showed mixed results. The extract resulted in symptomatic improvements that were large enough for caregivers to notice although the overall physician evaluations (clinical global impression) were unchanged.

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