Siberian ginseng (Eleutherococcus senticosis) is commonly recommended by herbalists to those looking to improve cognitive function.
The research to back this up is unfortunately relatively thin but recent studies have provided some indication of its benefits:
double blind placebo controlled randomised study conducted in Japan combined Siberian Ginseng with Gu-sui-bu (Aglaomorpha fortune)
found that the herbs significantly improved recall while simultaneously reducing stress levels
Siberian ginseng and Ischemic Stroke
A2021 study published in the journal Food and Function looked at the mechanisms by which Siberian Ginseng can help with ischemic stroke
finding it regulated neurotransmitters, reduced oxidative stress and inflammatory damage