This is really bad stuff, L-Dopa is absolutely not used to treat the disease. It's the final clock of normalcy. To paraphrase an expert on the matter, when you

This is really bad stuff, L-Dopa is absolutely not used to treat the disease. It's the final clock of normalcy. To paraphrase an expert on the matter, when you choose to use L-Dopa, you're starting a period of a year or two of relative normalcy again before the brain uncontrollably continues its decent. Do you use it earlier and have better good years, or later and buy just a few more before the end? This is not a treatment. It's a mercy clause. Also, there is no such thing as a nervous cell. There is deep brain stimulation, which overcomes some of the dopaminergic destruction of those neurons, but this does not AFAIK change the course of progression in the disease. Please, the bar here is not high, but there's a good level for factual correctness. If there is something revolutionary, a cited source would help a lot. As someone who didn't cite this, but I think some of this is not too extraordinary knowledge. The sharing is good and appreciated at least. :)