melanotan II C50H69N15O9 CID 92432 PubChem Health warning over 'dangerous' self tan product after increase in ads Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Don't risk your health for a summer glow! Tanning nasal sprays are creeping onto the UK market, particularly on online and lack of regulation means they are a significant risk to your Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and