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Ginkgo biloba

Review of research on ginkgo as a treatment for tinnitus

In this paper, researchers review five randomized, placebo-controlled studies of ginkgo extract's ability to relieve the symptoms of tinnitus (ringing in the ears). Four of the studies-which included 521 patients total - showed significant decreases in the loudness, severity, and/or frequency of symptoms for patients treated with ginkgo. The fifth study, involving 20 patients, found no difference between ginkgo and placebo. The authors believe that the treatment dose in that study - 16.2 mg/day - was too small to be effective. Doses of 120 to 160 mg/day were used in the other studies. The reviewers suggest that additional studies, using rigorous and consistent methods, are needed before concluding that ginkgo is an effective treatment for tinnitus. Ernst E, Stevinson C. Ginkgo biloba for tinnitus: a review. Clinical Otolaryngology 1999; 24:164-67.

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