Detailed Product Description specification and technical indicators1. ginkgo flavonoids 24%, terpen lactones 6%2. ginkgo flavonoids 24%, terpen lactones 6%, ginkgolic acid 5 ppm3. ginkgo flavonoids 24%, terpen lactones 6%, ginkgolic acid 1 ppm4. ginkgo flavonoids 24%, terpen lactones 6%, ginkgolic acid 1 - 5 ppm, water soluble GBE5. European standard GBE