I don’t recall reading any reports from the community on DF and Parkinson’s. I do not see it in the lists of conditions that Dr. Filinov or Dr. Schennikov provide for conditions they regard as treatable using DF, but I also don’t see it in their lists of contraindicated conditions.
I’d suggest a discussion with your physician or with a clinician who supports fasting regimens. As Parkinson’s is chronic, I don’t see where a person would have anything to lose by attempting it, though I might stage into it, say one-day, three -day, five-day, seven-day, but that’s just an observation, not medical advice.