Pharmacological Activation of the Melanocortin System Limits Plaque Inflammation and Ameliorates Vascular Dysfunction in Atherosclerotic Mice Arteriosclerosis, Thrombosis, and Vascular Biology One month. Minimal sun. Real results. These results are after a 10 day loading phase and just 1 month of our Barbie Peptide (Melanotan II) with little to no sun exposure. Melanotan II Results (With Before And After Pictures) The Tanning Drug Figure 5 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar