Melanotan II (Tan Jabs): Why They're Not Worth The Risk Melanotan 2: Evaluations, investigations, and more George Herald The Last Tanner Tattered discusses melanotan 2 and its potential effects on autism, citing Clavicular as an example of someone whose behavior may have changed while using the compound. >> More below Facebook MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent.