Ginseng


#1
Some evidence of its neuroprotective effects:

http://ginsengres.org/Upload/files/GINSENG/342-353(0015).pdf

Here you can find a thread in neurotalk that shows people's personal experiments with panax ginseng:

http://neurotalk.psychcentral.com/thread183181.html

Of course this is not real science but many of the people report serious improvement after taking panax ginseng.