This guy injected himself with a drug called Melatonan II for 5 months. Here's his before after. : r pics Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically It doesn't take much to fall down the Barbie Drug rabbit hole. In self tanner subreddits and on TikTok Shop, the tanning injectionaka Melanotan IIis marketed as a self tanner alternative that works by Melanotan II (Tan Jabs): Why They're Not Worth The Risk