Ginkgo biloba is the oldest living tree species and can live as long as 1,000 years and grow to a height of 120 feet. For thousands of years, leaves from the Ginkgo biloba tree have been a common treatment in Chinese medicine. In the U.S., many take ginkgo supplements in the belief that they will improve memory and sharpen thinking. Flavonoids and terpenoids are the mainly pharmacologically active groups of compounds present in the Ginkgo leaf extract. Different herbal dosage form like extract, Infusion, capsule and tincture are available in market.