Imagine just wanting to be jacked and tan and you end up like this? Melanotan II is a peptide that increases the melanin in your skin and can give men a boner that Melanotan 1 vs. 2: My Summer Journey & Real Results 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 Melanotan 2 10MG Raw Amino SYNTHETIC MELANOTROPIC PEPTIDE INITIATES ERECTIONS IN MEN WITH PSYCHOGENIC ERECTILE DYSFUNCTION: DOUBLE BLIND, PLACEBO CONTROLLED CROSSOVER STUDY Journal of Urology Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations