Melanotan II (MT 2) Nasal Spray 10mg 10 mL VPeptide MT 2 Nasal Spray Canada: Ultra Pure Melanotan II Peptide for Pigmentation & Peptide Pathway Research Melanotan II (Tan Jabs): Why They're Not Worth The Risk Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and longer lasting than Peptides for tanning do exist. Melanotan 1 and Melanotan 2 both work at increasing melanin in the skin. Melanotan 1 takes longer to activate. Melnotan 1 is FDA approved. Melanotan 2 does libido,