Although there’s plenty of evidence to show that “toxicity cleanses” are nonsense, you’re absolutely right about the importance of good nutrition in keeping PD under control, as with many chronic conditions. My husband has never had bowel issues probably because we have always grown a lot of our own fruit & vegetables and eaten a diet cooked “from scratch” with few processed foods.
I share your feelings about standard medication (which had a disastrous effect on my MIL who was eventually diagnosed with DLB) and fortunately we have not had to make a decision on this as my husband’s neurologist, a movement disorders specialist, shares our views that he is best left untreated with drugs given his particular constellation of symptoms. Exercise however, especially a long walk each day, is an essential part our lives.
One has to take responsibility for oneself as far as one is able though due to cognitive issues my husband somtetmes needs my support to do so. PD impacts us both but between us we’ve learnt how to control things for my husband to the benefit of us both; we continue to live full lives. Too little is understood about the causes of the disease, including its differing manifestations, for there to be a chance of a cure anytime soon.