The Barbie Peptide? Why Melanotan 2 Has Become One of the Most Talked About Compounds in the Peptide World Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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 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