anyone is free to do what they want but imho i would recommend to anyone they start with sinemet, a simple pharmeceutical grade drug which is safe and predictable, find out how well it treats your symptoms, and then try alternatives if so inclined.

fwiw, i've attended 2 presentations by Laurie Mischley to pd support groups in the last 2 months and both times she mentioned she highly recommends sinemet to her patients. FAVA and mucana might have been mentioned in passing. I don't think she's an expert on sinemet but she gets around and talks to a lot of neuros and pd'ers from what she says.