CNN.com – according to a study out this week in the Journal of the American Medical Association. Ginkgo is a top-selling herb and has been hailed by some as a memory-booster, but the new University of Pittsburgh study found it didn’t help prevent Alzheimer’s or other forms of dementia in more than 3,000 elderly study subjects.

Ginkgo manufacturers say this isn’t the first — or the last — word on the herb. “There is a significant body of scientific and clinical evidence supporting the safety and efficacy of ginkgo extract for both cognitive function and improved circulation,” said Mark Blumenthal, executive director of the American Botanical Council.

Blanche Danick may be 86 years old, but she’s pretty hip. She keeps up with all the latest health news, and a while back, she called her daughter wanting to know whether she should start taking the herb ginkgo biloba. She’d heard it might stave off Alzheimer’s disease.

“I told her not to bother, that it wouldn’t make much of a difference,” says her daughter, Edythe London, a professor of psychiatry and pharmacology at the University of California, Los Angeles. “On the basis of what I’ve read, I don’t think it staves off dementia.”

Scientists and researchers reached to a general conclusion; exercise, balanced meal and brain training will keep you away from that disease.

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