Posted by Racer on November 19, 2006, at 16:39:06
In reply to Re: CLEVER ONES!..NEED INFO ON BRAIN NEUROTRANSMIT » linkadge, posted by Caedmon on November 19, 2006, at 16:07:15
> However linkadge, what do you make of those studies in which monoamine depletion caused low mood states in normal subjects? (I forget how this is done, and the exact methods used in such studies but I think you know what I'm onto.)
I think I've read those studies, too. I can't comment on the results, but as I recall, the method was to have volunteers drink an amino acid solution which did not contain tyrosine nor tryptophan, the dietary precursors to dopamine/norepinephrine and serotonin. Since all the other amino acids were present, it altered the ratios of amino acids crossing the blood brain barrier, and thus the balance of neurotransmitters in the brain.
From what I've read, they used Hershey's syrup to make the amino acid solution palatable. I certainly hope this does not mean that Hershey's syrup leads to lowered mood...