NOW® Ginkgo Biloba is grown & extracted under the highest quality standards & is standardized to min. 24% Ginkgoflavonglycosides. Our Ginkgo Biloba Extract is the finest top quality available worldwide. Scientific research has demonstrated that Ginkgo Biloba Extract has antioxidant activity in in vitro studies.* Consult physician before consumption if you are pregnant/lactating or currently taking anti-coagulant or MAO inhibitive drugs. As a dietary supplement, take 1 dropperful in tea or water 1 to 2 times daily. Consider taking this product in combination with NOW® Phosphatidyl Serine, Soy Lecithin & DMAE. Distilled Water, Vegetable Glycerin & Grain Alcohol.