Posted 7/3/2013 12:16 PM (GMT -5)
Well, for instance, the neurotransmitter dopamine is primarily produced in the brain and gut, I believe
Its not so compartmentalized as you are thinking. Its a complex reaction that is a cascade. Its not like, you take x substance and turn on more dopamine. You have to support the cycle and it in turn supports the organs that create the necessary proteins,etc.