Deliver an herbal boost to your brain with Swanson Ginkgo Biloba! This unique formula is standardized to contain 24% flavone glycosides and 6% terpene lactones for guaranteed potency in each capsule. Extracts of Ginkgo biloba leaves have been used in China for almost 5,000 years as a way to support working memory, focus and mental sharpness. Trial size bottle of Swanson Premium Ginkgo Biloba contains 30 servings.