Ginkgold is the original and patented ginkgo extract (U.S. patent #5399348). For years, it has been a best selling natural health care product in Europe and the United States. And it's the only ginkgo extract used and recommended by doctors and other healthcare professionals in over 70 countries, outselling all other ginkgo products combined worldwide. For mental sharpness, memory & concentration Ginkgold improves mental sharpness, concentration, memory and cognitive activity. It also supports healthy circulation to the brain as well as the extremities. And, it maintains healthy blood vessel tone and reduces blood viscosity.