an amino acid found in most proteins; a precursor of several hormones
"After discussing her plans to synthesize thyroid hormone, the nutritionist recommended increasing her intake of tyrosine-rich foods like eggs and dairy."
A nonessential amino acid 2-amino-3-(4-hydroxyphenyl)propanoic acid found in most animal proteins, especially casein
"The doctor explained that because tyrosine is a nonessential amino acid found abundantly in casein, the patient could rely on their regular dairy intake to meet daily needs."