Standardized
Ginkgo Leaves contain flavonoids, terpene lactones (including ginkgolides and bilobalide) and other compounds. Ginkgo 2:1 is standardized to contain 9.6 mg/mL of ginkgo flavonglycosides (ginkgo flavone glycosides) to ensure optimal strength and quality. Ginkgo can:
provide antioxidant activity
support normal memory function
promote mental clarity
maintain healthy eyes
support normal hearing function
support the body as it ages
help maintain proper energy
support a healthy cardiovascular system
support healthy blood function
support healthy oxygen flow to the brain and peripheral areas of the body*
Suggested Use: Dilute 1 mL (approx. 50 drops) in water or juice 3 times per day, or as directed.
 
Complimentary Educational Tools
Ginkgo Study
MediHerb The Quality Choice for Practitioners Handout
Ginkgo Quality Issues
 
 
 
The ginkgo flavonglycosides (ginkgo flavone glycosides) of Ginkgo biloba, comprising quercetin, kaempferol and isorhamnetin are the phytochemicals most often referred to as indicators of quality and efficacy. However, these compounds are mainly marker compounds which are used to identify the extract. The therapeutically active ingredients are believed to include the ginkgolides and bilobalide, which cannot be tested by normal HPLC methods. They require more sophisticated methods of detection such as Refractive Index (RI), Evaporative Light Scattering Detectors (ELSD) or Mass Spectrometry (MS). MediHerb uses ELSD detection to accurately quantify the levels of these therapeutically important phytochemicals. The other important group of phytochemicals from Ginkgo are the ginkgolic acids (C13:0, C15:1 and C17:1 on the third figure). These compounds have been identified as contact allergens. The maximum level of ginkgolic acids in Ginkgo biloba extracts has been set by the European authorities at 5 ppm. Many poor quality extracts contain levels of ginkgolic acids which are many orders of magnitude higher than this recommended maximum.