Back in 2013, Dr. Mary Newport gave a Ted talk on her re-discovery of MCT oil (she'd been aware of it for several years). In short, it greatly helped her husband with AZ. More recently, Ketone Esters are said to be even more potent than MCT oil. This video is from Dr Newport's talk. I've started looking for anything that shows what any of this can do for AZ or PD.
Here's a much newer, updated interview: