For thousands of years the Chinese have used gingko biloba to increase memory and sharpen thinking. This is due to ginkgo’s amazing effect on the human body. It works as an antioxidant and increases blood flow in the brain. Studies have found that gingko can boost memory and cognitive speed in healthy people. While more research is needed, researchers have tested the effects of gingko Biloba on medical conditions, such as, ADD, ADHD, Depression, and many other psychological conditions.