Medicinal Use of Ginkgo Biloba In memory enhancement

Medicinal Use of Ginkgo Biloba In memory enhancement
Ginkgo is believed to have nootropic properties, and is mainly used as memory and concentration enhancer, and antivertigo agent. However, studies differ about its efficacy. The largest and longest independent clinical trial to assess Ginkgo biloba published the finding in 2008 that the supplement does not reduce incidence of all-cause dementia or Alzheimer's disease in adults 75 years or older who had normal cognition or mild cognitive impairment when given a twice-daily dose of 120 mg extract of G. biloba. However, a similar trial published in 2010 concluded the same extract formulation of G. biloba (EGb 761), when given as a single 240-mg daily dose, "was found significantly superior to placebo in the treatment of patients with dementia with neuropsychiatric symptoms."
According to some studies, ginkgo can significantly improve attention in healthy individuals. In one such study, the effect was almost immediate and reaches its peak 2.5 hours after the intake.
One study suggests ginkgo's effect on cognition may be attributable to its inhibitory effect on norepinephrine reuptake.
Nonetheless, a meta-analysis in 2012  reported zero effect sizes for the impact of Ginkgo biloba on memory, attention and problem-solving.