Posted by 3 Beer Effect on December 30, 2001, at 14:28:31
I am starting an amino acid therapy program as an alternative to psychiatric anti-depressants & am taking 5-htp & l-tyrosine, 750 mg of GABA, & a multi-vitamin. I am hoping this combination, along with an aerobic exercise & weight lifting program will restore my serotonin, norepinephrine, & dopamine, & GABA (A) to normal non-depressed levels.
The problem is that I cannot find any non-commercial sources of info about amino acids & have the following question-
Are both norepinephrine & dopamine both produced from the precursor l-tyrosine, or is norepinephrine produced from the precursor dl-phenylalanine & dopamine produced from l-tyrosine?
I know the synthesis of dopamine goes from l-tyrosine, to l-dopa, & then to dopamine.
But how does the body synthesize norepinephrine?
If the body produces both norepinephrine & dopamine from l-tyrosine, then what is the point of taking dl-phenlalynine? Does one of these amino acids cross the blood brain barrier easier than the other?
Also, any recommended dosages or dosing regimens?
Also, what are the half lives of 5-htp, dl-phenylalanine, & l-tyrosine? I currently take the 5-thp (starting at 50 mg but bottle says to slowly work way to 200 mg over a couple of weeks) & GABA (750 mg) just AT BEDTIME & the l-tyrosine (500 mg) just in the morning (since i'm afraid it might cause insomia?)?
poster:3 Beer Effect
thread:88248
URL: http://www.dr-bob.org/babble/20011222/msgs/88248.html