One of the hottest HERBAL supplements these days is ginkgo

One of the hottest HERBAL supplements these days is ginkgo. A new brand, Ginkoba, is being promoted as the "thinking person's supplement." (From the same folks who market Ginsana.) Ginkgo extract is widely sold in Europe. Physicians there use it in older patients to treat signs of cerebral insufficiency...poor memory, confusion, dizziness, etc.

It seems to work by improving blood flow to the brain. It also has some antioxidant effects.

Ginkgo might help improve mental function in patients with poor cerebral circulation. Don't expect much improvement in normal folks.