Thanks for the interesting question. The article is here if anyone else would like to have read:
There is currently a wave of interest in the potential benefits of fasting for improving our health and even protecting our brains. If fasting could stimulate the growth of new brain cells it could have enormous potential for preventing or even slowing the course of neurodegenerative conditions like Parkinson's.
However, at this stage the research has only been carried out in animal studies. These experiments have produced promising results but they need to be reproduced in trials in people before we can be sure how real they are.
Because fasting can be dangerous for people who are not in good general health we also need trials looking at fasting in people with Parkinson’s to check whether this approach to diet is effective and safe in the long-term.
I hope this answers your questions!