using expired melanotan II (“Tan Jabs”): Why They're Not Worth The Risk Melanotan II | Melanocyte Research
Description
Location Any mucosal tissue, floor of mouth and gingival tissues adjacent to an amalgam restoration are common locations

"Classical and emerging roles of vitamin d in hepatitis C virus infection"
doi:10.1038/nrd.2017.243

A separate study focusing specifically on psychogenic erectile dysfunction found that Melanotan II produced clinically apparent erections in 8 of 10 men, with mean duration of tip rigidity greater than 80% lasting 38 minutes compared to 3 minutes with placebo
