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GHK-Cu is a tripeptide composed of glycine, histidine, and lysine, bound to a copper ion

Over-replacement is associated with symptoms of hyperthyroidism, including palpitations, weight loss, heat intolerance, and osteoporosis from long-term high doses

Published Aug 13, 2025

Studies show that PT-141 injections can significantly improve scores on the International Index of Erectile Function, particularly in the domains of sexual desire and erectile quality

Other medications like Kerendia (finerenone) that do not lower glucose are sometimes included as adjunctive therapies, too

Research interest has focused on its possible role in telomere biology, telomerase activity, melatonin regulation, sleep quality, and age-related cellular processes