Posted by DSCH on October 10, 2003, at 21:08:12
In reply to Re: L-Tyrosine vs. L-Phenylalanine » DSCH, posted by Larry Hoover on October 10, 2003, at 19:49:41
> > Larry,
> >
> > Previous threads on PB on amino acid supplemention weren't very clear on this point and I'd like you to comment on it if you may: if increased synthesis of dopamine and norepinepherine is desired, which amino acid is generally the most effective?
>
> Tyrosine, hands down. They each have similar molecular weight, so you can compare them by weight. The "yield" from phenylalanine, in terms of dopamine, is no more than 25% that of tyrosine, and may be less than that, due to variables such as genetic factors, dietary history, vitamin stutus, etc.
>
> So, 500 mg tyrosine has the effect of at least 2 grams phenylalanine, from a dopamine-synthesis perspective.
>
> LarReferences? Please and thank you? ;-)
poster:DSCH
thread:267473
URL: http://www.dr-bob.org/babble/alter/20031003/msgs/268076.html