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Sexual Health Peptides
Libido, vitality & performance
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Sexual Health
Melanotan 2
Melanotan-2 (MT-II, CAS# 121062-08-6) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone (α-MSH), engineered with a lactam bridge between Asp and Lys residues, N-terminal acetylation, C-terminal amidation, a norleucine (Nle) substitution, and a D-phenylalanine (D-Phe) residue. This combination of structural modifications produces a conformationally constrained, proteolytically stable scaffold studied as a non-selective pan-melanocortin receptor agonist (MC1R through MC5R) in preclinical and in vitro research. Supplied by BIOSTACKS as a lyophilized powder for in vitro laboratory research use. This compound has not been authorized by Health Canada for any therapeutic, clinical, or human use.
Sexual Health
PT-141
PT-141 (Bremelanotide) is a synthetic cyclic heptapeptide analogue of α-melanocyte-stimulating hormone (α-MSH), structurally derived from the Melanotan-II scaffold via removal of the C-terminal amide and formation of a lactam bridge between Asp⁵ and Lys¹⁰. It exhibits potent, non-selective agonist activity at melanocortin receptor subtypes — with highest affinity at MC4R — and has been extensively studied in preclinical models investigating the central melanocortin system. Its cyclic architecture confers enhanced metabolic stability relative to linear α-MSH analogues.