Parkinson's disease

is when your brain stops making? isn't getting? enough dopamine. I think I read there are different kinds maybe?

Symptoms
Vary. The famous one is the parkinson's tremor. Parkinsons is broken into 5 stages, from "not a huge deal" to "you might die from choking on your food or even your own spit"

Someone on the Pacific Crest Trail described one symptom to me as something like "you tell your body to do something and it sort of like takes a few seconds to do what you asked". He also said he thought it felt like getting old.

Treatments
Exercise is one of the best treatments for Parkinson's. More exercise-for-Parkinson's resources (geared toward hiking probably) here:

The hiker told me there are multiple (if I understood correctly!) Parkinson's orgs that do something with supporting people with Parkinson's backpacking on the Pacific Crest Trail. I found one online, it is: https://passtopass.org/

Fava beans
Fava beans have the same chemical in them that is in a lot of parkinson's prescription medications.

The only thing about fava beans is that favism is a thing. Basically, in rare cases, there are people who can be deadly non-allergic reaction to fava beans.

This dietician suggests starting off small, with like 1-2 tablespoons of fava beans per day for the first week to see if you can recognize a change. Fresh/new fava beans are the ones to use for this.

I read about a small study done in like 1913 but I didn't save that link. Found it on NIH. I figured there were more recent studies. Like this one.

and flu
https://www.parkinson.org/blog/science-news/flu-factor-link-with-parkinsons