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 Martina Big, 36, who is from Germany, and her husband Michael Eurwen, 38, who both injected Melanotan, a synthetic hormone to darken their skin have announced that they are planning to permanently We're addicted to tanning and want to look 'crispy' we'll do anything for darker skin but trolls say we need help Swolverine Top Fitness Blog Bodybuilding, Nutrition, Supplements