Ginkgo Biloba Leaf Powder - 1Kg (10 x 100g Sachets) Specification: 24%/ 6% Ginkgo extract comes from the leaves of the common Ginkgo Biloba tree. It contains 24% ginkgo flavonglycosides (bioflavonoids) and 6% terpene lactones as its active parts It is used for its positive effects as a powerful antioxidant.