Melanotan II: Tanning injections, nasal sprays harmful to health Dreaming of a sun kissed look? Melanotan 2 is a synthetic peptide that supports melanin production the pigment responsible for darker skin, hair, and eyes. Originally developed in the 1980s Melanotan II Self Tanner Dark Skin Sun Tanning Spray Tanning Nasal Spray Melanotan II and Mt 2 Tanning Spray Nasal price 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