study from Williams College shows that taking ginkgo supplement for six weeks does not improve memory, learning or concentration for older healthy adults.

Several over-the-counter treatments are advertised to improve memory, attention, and related thought functions. Paul R. Solomon, Ph.D., of Williams College, in Massachussetts conducted a randomized, double-blind, placebo-controlled trial of the effects gingko on memory and recognition. Participants took 40 mg of gingko, 3 times a day for 6 weeks. Compared to placebo, ginkgo did not improve performance in 14 standard tests of learning, memory, attention, and concentration, or naming and verbal fluency, in the elderly adults. The ginkgo group also did not differ from the placebo group in self-reported memory function or rating by spouses, friends and relatives. In 1994, Congress passed a law that forbids the Food and Drug Administration from regulating foods. Ginko Biloba is sold as a food.

August 21, 2002 The Journal of the American Medical Association 2002; 288:835-840.

Checked 5/3/07

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