L Tyrosine is a non-essential amino acid, which plays an important role in the production of the neurotransmitters dopamine and norepinephrine. Tyrosine is also a precursor to thyroxine and triiodothyronine and the pigment melanin. A hard training athlete/bodybuilder may benefit from supplementing with L Tyrosine, directly affecting Dopamine levels, which could help to counter fatigue and the stresses associated with intense and heavy workouts. There is also some research to suggest that L Tyrosine could also be useful in weight loss.
