The 2014 article you posted on AD was extremely interesting, lurkingforacure. There's a new one out now by the same researchers:

Reversal of cognitive decline in Alzheimer?s disease - AGING Journal (June 2016)

Since AD and PD are both neurodegenerative diseases and both can lead to significant cognitive decline, I am open to the possibility that what helps people with AD might also help people with PD.

In support of this possibility, the man in the UK who reversed his PD symptoms ...
Southsea man says healthy lifestyle has reversed Parkinson's
... used a comprehensive supplement protocol which had many of the same elements as Dr. Bredesen's M.E.N.D. protocol against AD.

Does anyone else find this interesting?