Numerous studies have shown benefits of using ginkgo biloba extract to improve the mental sharpness of geriatric patients. For example, W.V. Weitbrecht and W. Jansen, of Nuremberg, Germany, conducted a double-blind study involving 40 patients, ages 60 to 80, who had been diagnosed with primary degenerative dementia(Weitbrecht 91). During the 3-month study, one group of 20 received either Ginkgo biloba extract(120 mg/day), while the other 20 was given a placebo(Weitbrech 91).

The researchers reported that those receiving the ginkgo extract were more alert, scored higher on psychometric tests a

Following the tests, the researchers determined that there was a 79 percent improvement in the ginkgo biloba group, compared with the 21 percent on the placebo(Brown 64). The trial group received 120 mg/day of ginkgo biloba extract for three months(Brown 64).

electroencephalogram measurements in the ginkgo biloba extract

shown ginkgo extract increases the rate of information transmission by

The treatment group began to show signs of improvement after 12 days, the researchers said(Funfgeld 1248). In the controls, it took 30 days before an change was noticeable(Funfgeld 1247).

Alkaloid derivatives(Brown 64). Pretrial examinations determined the extent of dizziness, headaches, movability, sensory manifestations, etc., as well as typical psychometric tests(Brown 64).

In 1990, French researchers studied th

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