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 The assessment and aetiology of drug induced ischaemic priapism International Journal of Impotence Research Know your molecule: pharmacological characterization of drug candidates to enhance efficacy and reduce late stage attrition Nature Reviews Drug Discovery Protein tyrosine phosphatase 1B in metabolic diseases and drug development Nature Reviews Endocrinology