Low incidence of iris pigmentation and eyelash changes in 2 randomized clinical trials with unoprostone isopropyl 0.15% Ophthalmology Rise in use of 'dangerous' tanning injection Channel 4 News 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 This guy injected himself with a drug called Melatonan II for 5 months. Here's his before after. : r pics