Risks of Melanotan: TGA to issue fresh warning against 'Barbie drug' The Australian Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Melanotan II Research Peptide Australia Peptide Queens Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Melanotan 1 Research Peptide NuVion