Peptides in the Limelight: US FDA May Ease Restrictions on Several Peptides The Dermatology Digest Melanotan vs. Astaxanthin for Glowing Skin 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 Labial melanotic macule Stock Image C057 2077 Science Photo Library Melanotan 2 Injectable Peptide