You Should Avoid Using Nasal Tanning Sprays 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 View of Association of tanning injection with hypercortisolism, hyperglycaemia and ketosis in type 1 diabetes mellitus British Journal of Diabetes Melanotan II is the product that's been dubbed the "Barbie drug" on social media, and promises to give users a tan without the sun but it can have serious side effects including, in rare cases,