PT 141 Nasal Spray vs Injection: Which Is More Effective? Melanotan 1 (MT 1) is a synthetic peptide utilized in laboratory research to investigate melanocortin receptor activity, pigmentation pathways, and related cellular signaling mechanisms. This material is provided strictly for controlled scientific MT 2 (Melanotan 2) 10mg Peptide, Packaging Size: 10 mg Vial at 980 box in Surat PT 141 (Bremelanotide) 15mg Polaris Peptides PT 141 Peptides Collective Melanotan 2 (MT 2) A synthetic research peptide studied within melanocortin receptor pathways. Widely explored in laboratory settings for its role in pigmentation signalling and neuropeptide activity. Used in research to explore: