2.

"Melanotan 2 is a synthetic peptide that absolutely produces a tan, that part is real, but it is not selective, so along with the tanning receptor it also hits receptors that cause nausea, stomach cramps, flushing of the skin, fatigue, decreased appetite, and in men spontaneous erections within one to five hours of injection. Beyond that there are documented cases of rhabdomyolysis leading to kidney failure, renal infarction, and priapism serious enough that surgery was needed to save function. There are also multiple published case reports linking Melanotan use to melanoma, and because it directly stimulates your melanocytes, the exact cells that become melanoma, this is the reason I would never recommend this peptide to anyone. It is an unregulated, non-FDA-approved product usually sold as a powder online with no quality control and no standardized dosing, so people end up having to be their own chemist calculating their own dose, and the reality is this is not worth the risk."

"Melanotan 2 is actually a black market product. It is not available for use in Europe, Canada, or the United States. It's not technically legal for use yet, but people are injecting it under their skin as a way to make their skin darker. There are major risks that can be associated with this injection, including skin cancer. It's still [...] in a testing phase. So it sounds like they're getting experimental melanotan 2 type of injections, which is something you should definitely stay away from. Don't do it."