Ginkgo

Ginkgo is believed to have nootropic properties, and is mainly used as memory and concentration enhancer, and anti-vertigo  agent. However, studies differ about its efficacy. The largest and longest independent clinical trial to assess ginkgo biloba’s ability to prevent memory loss has found that the supplement does not prevent or delay dementia or Alzheimer’s disease. Some controversy has arisen over the conclusions drawn by some studies that were funded by a firm which marketed Ginkgo.