Understanding Nasal Tanning Sprays and Melanoma Risk Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Melanotan I Pigmentation Signaling & UV Response Modulator I accidentally undid years of skin work and didnt realize it until it was too late., At the beginning of November, I started taking melanotan 2 and honestly?, I loved it., My tan deepened Melanotan II A Sun Kissed Look, and a Confident You.