Kyolic Brain Focus is a highly concentrated, pure ginkgo biloba extract in a convenient one-per-day potency. The Ginkgo Biloba used in Brain Focus is standardized to 24% ginkgo flavonglycosides and 6% terpene lactones. Ginkgo biloba extract has been shown to support healthy brain function and cognition, and may also protect against oxidative damage and help maintain healthy circulation. Gluten free.