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Dietary SupplementGinkgo Biloba ExtractSupports Mental AcuityGinkgo biloba is the oldest living species of tree on Earth having existed virtually unchanged for over 200 000 000 years. Source Naturals GINKGO-24™ provides 24% flavone glycosides plus 6% terpene lactones from concentrated premium quality ginkgo leaves. Flavone glycosides are bioflavonoids which deliver potent antioxidant protection. Extensive research has revealed benefits from ginkgo extract for blood flow neuroprotection and cognition.