![[dr. bob]](/dr-bob-sm.gif)
Dr. Bob is Robert Hsiung, MD,
bob@dr-bob.orgShown: posts 1 to 5 of 5. This is the beginning of the thread.
Posted by Maxime on December 23, 2007, at 15:14:59
I was looking up the benefits of L-tyrosine and found the exerpt below. Is it true that it is only useful during conditions of stress?
Maxime
A number of studies have found tyrosine to be useful during conditions of stress, cold, fatigue,[12] prolonged work and sleep deprivation,[13][14] with reductions in stress hormone levels,[15] reductions in stress-induced weight loss seen in animal trials,[12] improvements in cognitive and physical performance[10][16][17] seen in human trials.
Tyrosine does not seem to have any significant effect on mood, cognitive or physical performance in normal circumstances
Posted by Sigismund on December 23, 2007, at 21:30:55
In reply to L-tyrosine only effective during stress?, posted by Maxime on December 23, 2007, at 15:14:59
Hi Maxi
Isn't it the equivalent of saying that vitamins can only be useful if the diet is deficient?
I think that's why it is put like that; to discourage unnecessary tyrosine use.
Anyway, if you were stressed (but what's that?) I wonder if you'd be better off without tyrosine?
It has a stimulant-like effect.
Posted by Maxime on December 25, 2007, at 11:45:39
In reply to Re: L-tyrosine only effective during stress? » Maxime, posted by Sigismund on December 23, 2007, at 21:30:55
Yes, you are right (the analogy with the vitamins). But I thought tyrosine was suppose to make one more calm. That's what it says on the bottle I have.
Maxime
Posted by Sigismund on December 25, 2007, at 15:34:34
In reply to Re: L-tyrosine only effective during stress? » Sigismund, posted by Maxime on December 25, 2007, at 11:45:39
Well, it's converted to dopamine and NE through various steps.
That might make some people more calm.
It made me more alert.
If you take enough (too much) it will put your blood pressure up.
Posted by cumulative on December 25, 2007, at 19:39:04
In reply to L-tyrosine only effective during stress?, posted by Maxime on December 23, 2007, at 15:14:59
It's obviously untrue that l-tyrosine doesn't present an effect when ingested at supraphysiological levels. It's quite effective for many people. The main problem with tyrosine to my mind is the very rapid (usually 2 weeks or so) development of almost complete tolerance.
Nice as a mild, short-term stimulant in my opinion, or for help getting out of ruts, or for stimulant withdrawal.
This is the end of the thread.
Psycho-Babble Alternative | Extras | FAQ
Dr. Bob is Robert Hsiung, MD,
bob@dr-bob.org
Script revised: February 4, 2008
URL: http://www.dr-bob.org/cgi-bin/pb/mget.pl
Copyright 2006-17 Robert Hsiung.
Owned and operated by Dr. Bob LLC and not the University of Chicago.