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 longer lasting than Day 2 on MT2 and Already Regretting It A Dermatologist Reacts YouTube Rise in use of 'dangerous' tanning injection Channel 4 News Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News 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