Catecholamine

A class of biologically active amines derived from the amino acid L-Tyrosine, including dopamine, norepinephrine (noradrenaline), and epinephrine (adrenaline). Catecholamines function as both neurotransmitters (in the central nervous system) and hormones (released by the adrenal medulla into the bloodstream). Their synthesis pathway — phenylalanine → tyrosine → L-DOPA → dopamine → norepinephrine → epinephrine — is the biochemical rationale for L-Tyrosine supplementation in cognitive and stress-response products.