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The seven-amino-acid cyclic structure of [Melanotan 2]( creates conformational rigidity that slows enzymatic cleavage, while Melanotan-1s linear 13-amino-acid chain is more vulnerable to peptide bond hydrolysis over time

The arginine salt formulation shows only 15.1% degradation after 5 hours at pH 3.0, compared to 99% destruction of standard acetate forms under the same conditions

doi: 10.1038/s44318-024-00036-1 184 HeoJ-MOrdureauASwarupSPauloJAShenKSabatiniDMet al

Selank + Noopept Noopept (N-phenylacetyl-L-prolylglycine ethyl ester) is a synthetic nootropic that also modulates BDNF and NGF expression

heart, kidney, liver in pulmonary fibrosis)

Teichman SL, Neale A, Lawrence B, Gagnon C, Castaigne JP, Frohman LA