Remember Thalidimide? The Researcher knew then had to prove it? It took time. Its only a matter of time IHO until how oral L Dopa meds work gets fully understood. But whos going to fund this. Big Pharm? Why would they its one of their cash cows. So it takes individual people to join the dots, compile the evidence. If you think Big Pharm do lots of R&D read an insiders book

Im responding so that myths dont perpetuate but u have to do your own research.

This is from a PhD study going on

Background: Levodopa (L-DOPA) is the most widely used and effective treatment for Parkinson’s disease (PD). Many in vitro studies however have shown that L-DOPA is toxic to dopaminergic neurones and have raised concerns that L-DOPA could cause neurodegeneration and accelerate the progression of PD. Despite extensive research over the last three decades the toxicity of L-DOPA has never been completely understood