Dangerous' tanning products promoted by influencers Love Island generation' skin cancer fear BBC News 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 Andrew Huberman discusses the risks and benefits of melanotan, a peptide that can dramatically increase energy and libido, but also carries serious health risks. >> See comments A new viral beauty habit that could have "catastrophic" long term consequences.