About 50 pounds of ginkgo leaves are required to produce one pound of extract. Ginkgo contains flavonoid glycosides like quercetin and other key compounds similar to gotu kola. Ginkgo leaf extract is very popular in Europe, where it has been the subject of significant scientific research for several years. Known as a powerful free radical scavenger, ginkgo also supports blood circulation to the brain, thereby optimizing the amount of oxygen supplied to brain cells. It may also help increase blood flow to the extremities.
Gotu kola is a creeping marsh plant widely used in India and East Asia.
A member of the parsley family, it grows in tropical areas and is used in some places as ground cover to retard soil erosion. It grows primarily in India and some parts of Africa. It is also found in America, where it has generally been considered only a food for wild animals. Its name is misleading, as it does not contain caffeine like the kola nut. It contains many nutrients that support the body's vitality and feed the nervous system, including vitamins A, B, E, G and K, and magnesium.