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 Diffuse facial melanosis An overview of etiology and dermoscopic findings Journal of Skin and Sexually Transmitted Diseases Melanosis THE ROCKAWAY TIMES 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 Melanotan II Erectile Dysfunction Studies: What Early Research Shows and Practical Realities