[7] The scientists also commented, Very surprisingly, Ipamorelin did not [appear to] release ACTH or cortisol in levels significantly different from those observed following GHRH stimulation
This is known as first-pass metabolism
Quick overview: why injections are used Vitamin B12, also called cobalamin, supports nerve function, red blood cell formation and DNA synthesis
Non-surgical treatments include hormonal therapies such as gonadotropin-releasing hormone analogs (GnRHa), progestins, selective estrogen receptor modulators, dopamine agonists, prostaglandin analogs, and selective progesterone receptor modulators [56,57]
doi: 10.1016/j.tem.2021.01.003 70 MaesMSongCYirmiyaR
doi: 10.1016/j.jconrel.2016.02.035 95 SalottoKEOlsonWCJr.PollackKEIllendulaAMichelEHenriquesSet al