An extract of Ginkgo biloba leaf is marketed in dietary supplement form with claims it can enhance cognitive function in people without known cognitive problems. Extracts of Ginkgo biloba leaf have been studied as a possible treatment for dementia and Alzheimer's disease, with mixed results. Ginkgo is used in dementia, whereas others have concluded that gingko extract may help people with dementia.

There is good evidence supporting the use of ginkgo for treating high blodd pressure, menopause-related cognitive decline, tinnitus, post-stroke recovery peripheral arterial disease, macular degeneration, or altitude sickness.