Imagine just wanting to be jacked and tan and you end up like this? Melanotan II is a peptide that increases the melanin in your skin and can give men a boner that Frontiers Inhibitory Effect of the Melanocortin Receptor Agonist Melanotan II (MTII) on Feeding Depends on Dietary Fat Content and not Obesity in Rats on Free Choice Diets Melanotan II: Before And After Tan, Bodybuilding Melanotan II (Tan Jabs): Why They're Not Worth The Risk