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Comparison with FDA-approved alternatives When compared to FDA-approved alternatives, GHK-CU stands out as a safe option with promising therapeutic potential

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PT-141 Receptor Selectivity PT-141 shows meaningfully greater selectivity for MC3R and MC4R compared to MC1R and MC5R: MC4R activity: Strong agonist activity MC3R activity: Strong agonist activity MC1R activity: Reduced compared to Melanotan 2 MC5R activity: Reduced compared to Melanotan 2 This selectivity profile means research designs using PT-141 can more confidently attribute observed effects to MC3R and MC4R mechanisms rather than other melanocortin receptor activity