Source Naturals L-Tyrosine 500mg 100T

L-Tyrosine is a free-form amino acid which
rapidly crosses the blood-brain barrier. It is a precursor for the
neurotransmitters dopamine, norepinephrine, and epinephrine, as well as
for thyroid hormones and enkephalins, special peptides which subdue
messages of physical discomfort. Tyrosine is also a precursor for the
protective skin pigment melanin.

L-Tyrosine