Dietary Supplement Herbal Factors Superior Bioavailability Purity & Potency Guaranteed Ginkgo Biloba Phytosome is the result of a unique, patented process that binds Ginkgo Biloba and key actives to phosphatidylcholine (from soy lecithin) resulting in superior bioavailability. Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada.