Melanotan I is a synthetic peptide that mimics the natural alpha-MSH hormone to stimulate melanin production in the skin, offering a sunless tan and providing potent UV protection against sunburn and skin cancer. Unlike its counterpart Melanotan II, it is highly selective for the MC1R receptor, meaning it delivers tanning benefits with a much lower risk of side effects like severe nausea, facial flushing, or spontaneous erections.
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