Really dangerous' tanning products containing melanotan 2 on the rise warns dermatologist Express.co.uk Melanotan 2: The Path to a Bronze Tan, a Leaner Physique, and Enhanced Libido PARTICLE, s. r. o. Melanotan 2 tanning injections 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