Tanning Nasal Spray: Please Don't Use It Glamour Home So Damn Tanned! Seven Days Of Melanotan 2 Only about 4 hours of sun exposure this week. I feel as though my face has gotten the best results so far. Hoping the sun actually comes 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 Say No to Nasal Tanning Sprays Dermatology Times