Science-Based Nutrition Dietary Supplement ProfileProven - Quality Assurance Helps Promotes Mental Function and Memory Vegan Non-GMO and Gluten Free Helps Supports Circulation in the Brain Helps Promotes Mental Function and Memory Extra Strength Ginkgo supplies premium quality Ginkgo biloba standardized extract, guaranteed to contain a minimum 24% flavone glycosides and 6% terpene lactones, as verified by independent laboratory analysis. This Ginkgo Extract is guaranteed by the ProfileProven Quality Assurance system developed by Ethical Naturals, Inc. This process includes the most extensive testing and screening at every stage of manufacturing to assure purity and potency.