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 No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky Even with Vicks, you're not immune to nasal addiction. Just like with Afrin, if you use this medication for more than three days, your nose will start to crave it and will stay in a perpetually MT 2 (Melanotan II) Polar Peptides