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 Melanotan A Golden Tan Without the UV Damage. in Gilbert, AZ LifeSpann Primary Care & Esthetics Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Melanotan II (Tan Jabs): Why They're Not Worth The Risk What exactly is Melanotan and how does the tanning solution work?