L-Tyrosine is classified as a conditionally essential amino acid. Under most circumstances the body can synthesize sufficient L-tyrosine, principally from L-phenylalanine, to meet its physiological demands. However, there are conditions where the body requires a dietary source of the amino acid for its physiological demands. In addition to being involved in protein synthesis, L-tyrosine is a precursor for the synthesis of the catecholamines epinephrine, norepinephrine and dopamine, the thyroid hormones thyroxine and triiodothyronine, and the pigment melanin. Our L-tyrosine is flavoured with fructose to improve patient compliance and is catalyzed with the T J Clark phytogenic mineral catalyst for superior bioavailability.