Ginkgo biloba is found on almost every continent and is recognized as one of the oldest living trees. The leaves of these trees produce bioactive compounds that are believed to improve human health, specifically memory function by increasing blood supply to the brain. We will test eleven different brands of Ginkgo biloba to determine if each in fact contains Ginkgo DNA. We are also interested in examining the price points of each brand to see if the presence of Ginkgo correlates with price. It is our hypothesis, that less inexpensive brands may not contain Ginkgo.