Melanotan II A Sun Kissed Look, and a Confident You. 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 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 Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report