For Alzheimer’s Disease:
The Gingko tree is one of the oldest trees known to human beings, having grown on Earth over 50 million years ago. Of the different kinds of species, only the Gingko biloba tree survives to this day. The leaf extract of gingko biloba is the most widely sold phyto-medicine in Europe, and one of the best selling herbal medicines in the U.S. The European designation of the standardized product used in clinical trial is EGb761, while in the US, the herb is sold as a dietary supplement. Standardized preparations of gingko contains 24% ginkgolic acid. Ginkgold, ginkoba and ginkai are standardized products that has been used in clinical trials.
Gingko biloba has been the subject of more than 100 clinical studies, most of which are European. A review of clinical studies which lasted 6 months or more found gingko to be effective in treating mild to moderate Alzheimer’s as cholinesterase inhibitors such as aricept. Although some studies have produced conflicting/inconsistent results, most studies show improvement in cognitive function among patients taking 120-180mg daily in divided doses.