Ginkgo (Ginkgo biloba) is best known for improving memory, but it can also improve mood
because depression in people over 50 can be caused by decreased blood flow to the brain.
Older people are also more susceptible to depression because the number of serotonin
receptor sites on brain cells decreases with age. Ginkgo increases blood flow to the brain by
dilating the arteries and improving circulation, and preliminary studies show that it increases
the number of serotonin receptor sites. Take 120 to 240 milligrams daily of an extract
standardized for 24 percent ginkgo flavone glycosides.
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