That quick tan injection is NOT worth the risk., Melanotan peptide injections stimulate pigment cells, and its use has been linked to rapid changes in moles, including the potentially fatal skin The Best Peptide for Erectile Dysfunction: What PT 141 Offers (and Where It Falls Short) This guy injected himself with a drug called Melatonan II for 5 months. Here's his before after. : r pics Melanotan II A Sun Kissed Look, and a Confident You.