Quote:
Originally Posted by
WillBrink
A few things. You'll find any study that finds benefits of individual amino acids, be it L Tyrosine, Leucine, Arginine, etc will have used multi gram doses. Also, N-Acetyl-L-Tyrosine and L Tyrosine are not the same thing, and the improved solubility of N-Acetyl-L-Tyrosine may allow for a lower, but studies comparing them have been conflicting. No idea how they came to 200-500mg for N-Acetyl-L-Tyrosine. Not sure how N-Acetyl-L-Tyrosine would taste in coffee either. The lowest dose I have found in a study that found benefit was 2g. Most studies used far more. I suspect the 200-500mg of N-Acetyl-L-Tyrosine rec is simply due to the fact multi gram doses gets expensive. L Tyrosine is cheap.
Ok, thanks Will.... here is what they posted that had me worried.
Quote:
L-Tyrosine Side Effects
L-Tyrosine may help some people in their fight against depression, but dosages above 500 mg, in some people, may cause anxiety, restlessness and rapid heart rate. L Tyrosine can cause over stimulation, restlessness, anxiety, and insomnia. Heart palpitations or arrhythmias are potential side effects that occur from high doses of tyrosine. These can occur in sensitive individuals in as low a dose as 200 to 500 mg. Always start with a low dose, such as 200 mg or less, even if it means opening a tyrosine capsule and taking a portion of it.