It appears that an abundance of bad probiotics in the gut can help alpha-synuclein proliferate. The key then would be to eat a lot of dietary fibre to feed the good probiotics, take probiotic capsules, and also eat fermented foods. A gut that is healthy restricts the proliferation of bad bacteria.
sciencedirect.com/science/a...
I just wish I studied nutrition, then I might be better able to understand some of these words in scientific articles.