Published in Medical Letter on the CDC and FDA, September 12th, 2004
According to a study from the United States, "Ginkgo biloba leaf extract has been widely used in dietary supplements and more recently in some foods and beverages. Sample preparation procedures for determination of ginkgo terpene trilactones (including bilobalide and ginkgolides A, B, C, and J) in various sample matrixes were developed in this study. Ginkgo leaves and capsules were extracted with 5% KH2 PO4 aqueous solution under sonication. Tea bags...
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