Really interesting question, . I was actually able to find this study from the NIH about naturally occurring levels of L-dopa in fava beans here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3708185/. Fava beans are high in fiber as well! This would be a great topic of conversation during your next doctor's appointment. Hopefully s/he will be able to make some dietary recommendations. Hope this helps provide some info. - Chris, ParkinsonsDisease.net Team