Ginkgo 4 oz by Herb PharmWe prepare our Ginkgo Extract from the leaves of Ginkgo biloba trees which have been Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides. To assure optimal extraction of Ginkgo's bioactive compounds, the leaves are hand harvested in early autumn when Ginkgo's bioactive compounds are at their optimal concentration. They are then carefully shade dried and promptly extracted. These statements have not been