TRH (thyrotropin-releasing hormone) is a tripeptide (pGlu-His-Pro-NH2) that stimulates pituitary TSH and prolactin release and exerts widespread neuromodulatory effects in the central nervous system. Its role as the master regulator of the thyroid axis makes it essential in endocrine challenge testing and neuroendocrinology research. This product is a white lyophilized powder at >=99% HPLC purity in a sealed vial. Complete batch documentation and flexible supply options are available. All items are dispatched in plain, discreet packaging to protect buyer privacy, and high-value orders may be split into multiple parcels for customs safety. Delivery times to most destinations range from a few days to two weeks depending on the region and courier selected.