Melanotan II acetate salt is a synthetic peptide analog of alpha-melanocyte-stimulating hormone, primarily used in research for its ability to stimulate melanin production in the skin, leading to a tanning effect without UV exposure, thus reducing the risk of sun damage. It has been explored for treating conditions like erythropoietic protoporphyria, which causes extreme sunlight sensitivity. Additionally, it interacts with melanocortin receptors in the brain, potentially enhancing libido, sexual function, and suppressing appetite. As a research chemical, its use is not approved by major regulatory bodies for human consumption, and it is typically obtained through unregulated channels, posing safety risks including side effects like nausea, headache, and elevated blood pressure. Use should be under professional supervision.