The historical irony is real: PT-141 exists because Melanotan II worked so well that researchers spent decades trying to extract its best effects into a safer, narrower compound
Fan, X., Kavelaars, A., Heijnen, J
BPC-157 is a synthetic pentadecapeptide a chain of 15 amino acids, sequence GEPPPGKPADDAGLV, with a molecular weight of approximately 1419 daltons
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Interestingly, agmatine, a metabolite produced by the gut bacterium Bacteroides vulgatus was shown to impair ovarian function by inhibiting GLP-1 secretion through activation of the farnesoid X receptor (FXR) (Yun et al., 2024)