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 Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas Melanotan II (MT II) Peptide Therapy Beverly Hills 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 Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn