There was this article last week that showed curcumin avoided alpha-synuclein agregates and even unfolded misfolded alpha-synuclein. I started searching and found interesting data:
http://arjunanatural.com/blog/?cat=1 (--> curcumin helps depression by increasing serotonine and dopamine and growing new neurons)
http://www.ncbi.nlm.nih.gov/pubmed/23723666 (--> curcumin made people with Alzheimer better)
There is a form of bio-available curcumin, called BCM-95. I wonder why I am not able to find any preclinical tests of BCM-95 on rodents with PD ?