Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn 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 2 Vial Starter Kit (20mg Melanotan 2) goldenglo Seven Days Of Melanotan 2 , Only about 4 hours of sun exposure this week. , I feel as though my face has gotten the best results so far. , Hoping the sun actually comes out this week! , Have my