Thompson L-Tyrosine, 500 Mg, 30 Count (Pack of 2)

What the brand says

Tyrosine is a non-essential amino acid that can be created from the essential amino acid phenylalanine. Besides being essential for normal growth and development, tyrosine serves a precursor to the neurotransmitters dopamine, norepinephrine and epinephrine. It's essential for thyroid hormones and is an important part of peptides, such as enkephalins.