FDA Fast Facts Melanotan II an overview ScienceDirect Topics Why is Melanotan II one of the more debated compounds on this list?, Melanotan II is a synthetic compound that affects melanocortin receptors and has been discussed for its effects on skin Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Melanotan vs. Astaxanthin for Glowing Skin