I was researching supplement BCAA provided by my husband's functional medicine MD. I was surprised to find one of the ingredients was listed as a major contraindication with levodopa. L-Phenylalanine. Dug a little deeper and it related to protein and impact on levodopa.
Found an interesting article on nutrition and PD too. I wonder if you could still take the Amino acids a few hours away from the C/L. Folate, B6 and B12 remain important.
ncbi.nlm.nih.gov/pmc/articl...
-Syd