I-Ginkgo leaf extract iyisithako somuthi wemvelo esikhishwe emaqabunga esihlahla se-Ginkgo. Inothile ngezithako ezisebenzayo, okuhlanganisa i-ginkgolides, i-ginkgolone, i-ketone tertin, njll. I-Ginkgo leaf extract inemisebenzi nezinzuzo ezihlukahlukene.