I ran across an interesting online book about the effects of amino acids on brain function at http://books.nap.edu/openbook.php?re...=9620&page=292

It raised some issues that I hadn't thought about before. As I have mentioned before, I am a carnivore. Red meat I need. The book mentioned that amino acids cannot cross the BBB without transporters and that they must compete for them. Only so many seats on the train. The amiino acid tyrosine is of particular interest since it is the one that dopamine is made from.

These things caught my attention:
1- Not a whole heck of a lot is known about amino acid requirements in even a healthy population.
2- Competition for transporters can be fierce particularly under stress.

Now, if you remember, we are urged to avoid protein so that our precious sinemet can have those seats on the train. So, the raw material we so desperately need is left back at the station.

The question of sinemet addiction is a good one.