There is a whole subculture of people who take "supplements" for their brain. These "supplements" are called nootropics and some of them are potent chemicals.
"Life extensionists" have their own forums- they do the standard subculture thing that people do on bodybuilding forums. This sort of thing has been gaining ground since the early 2000s.
L-dopa, along with deprenyl are a staple of nootropic regiments.