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 That quick tan injection is NOT worth the risk., Melanotan peptide injections stimulate pigment cells, and its use has been linked to rapid changes in moles, including the potentially fatal skin Melanotan II: Tanning injections, nasal sprays harmful to health 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 Amazon.com: Radiant Chemistry : Unveiling the secrets of Melanotan II and it's Effects on Desire eBook : James, Nicolas : Kindle Store PDF) Melanocortin receptor agonists, penile erection, and sexual motivation: Human studies Melanotan II