Scitec Essentials - Ginkgo Biloba For cognitive performance 27% GINKGO FLAVONE GLYCOSIDES The extract of Ginkgo leaves contain certain herbal substances like ginkgolides and bilobalide and traditionally have been used for the maintenance of cognitive performance and proper microcirculation. Our Ginkgo Biloba product contains high-quality herbs standardized to provide 27% Ginkgo Flavone Glycosides.