MD stated that after 65 constipation is defined not by whether you pass feces every day, every second day, or every third day, but rather with what difficulty you pass it. The criteria is hard stools primarily. He state that 2, 3, or 4 days apart is not the criteria over age 65.
MD speculated that because the B vitamins affect and protect the nerves throughout the body it was very possible they have a direct effect on the Parkinson's processes.
Neuro stated that there is no placebo for the Parkinson "shakes". Whatever you are doing either has a chemical reason it works or it doesn't.