Melanotan II (MT II) Peptide Therapy Beverly Hills 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 Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically