Hi Imark3000,
I have no evidence to say it will be any improvement on levodopa. I just thought it was worth trying, to see if there were fewer side effects, taking the precurser of levodopa, instead of levodopa itself. Phenylalanine like levodopa passes the BBB, and the report in my first post claims it "has been shown to alleviate Parkinson's Disease and boost the neurotransmitters dopamine and adrenaline". I wondered whether it was a more controlled and natural process if the brain manufactured the levodopa, rather than being fed it from a chemical factory material.
A healthy person starts the eynthesis with protein. Starting the in brain process with phenylalanine is only one step away from that. Using levodopa is 2 steps away.
Ron