Studies of treatment with estrogen, ginkgo biloba, vitamin E and vitamin B supplementation have been done.

CNN: Better understanding of dementia leading to more effective therapies

"I don't think there is a role for ginkgo biloba in human health at this point, " says Gary J.

CNN: Study: Ginkgo doesn't cut dementia risk

The herbal supplement ginkgo biloba might be able to prevent some of the damage caused by a stroke, scientists report.

BBC: Ginkgo could reduce stroke damage

DeKosky says that there were two important conclusions to take away from the study: Ginkgo biloba is ineffective in battling dementia, but also that the herb is relatively safe.

CNN: Study: Ginkgo doesn't cut dementia risk

In the new government-funded study, volunteers ages 75 and older with either normal mental function or mild cognitive impairment took a twice-daily placebo or ginkgo biloba extract (for a total of 240 milligrams per day).

CNN: Study: Ginkgo doesn't cut dementia risk