L-Tyrosine is an amino acid that supports brain nutrition, as it is a precursor of the neurotransmitters dopamine, norepinephrine and epinephrine. The Solgar L-Tyrosine formulation provides Free Form L-Tyrosine to promote optimal absorption and assimilation.  L-Tyrosine is often supplemented to increase metal alertness, sleep deprivation and to improve mood from the symptoms of depression.