L-Tyrosine

tyrosine is an amino acid. … the body makes tyrosine from another amino acid called phenylalanine. Tyrosine can also be found in dairy products, meats, fish, eggs, nuts, beans, oats, and wheat. Tyrosine is most commonly used in protein supplements to treat an inherited disorder called phenylketonuria

tyrosine, phenylalanine, and catecholamine synthesis and function in the brain. Aromatic amino acids in the brain function as precursors for the monoamine neurotransmitters serotonin (substrate tryptophan) and the catecholamines [dopamine, norepinephrine, epinephrine; substrate tyrosine