Anyone ever heard of PQQ and whether there has been a clinical test on PD patients ? I found this article and I was impressed by it. It is supposed to slow down aging, make people recover from cognitive problems, prevent aggregation of a-syn in PD, ...
http://www.lef.org/magazine/2010/ss/Rejuvenate-Your-Cells-Growing-New-Mitochondria/Page-01
EDIT:
I found more info on wiki:
http://en.wikipedia.org/wiki/Pyrroloquinoline_quinone#cite_note-37
"PQQ is a neuroprotective compound that has been shown in a small number of preliminary studies to protect memory and cognition in aging animals and humans."