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In fact, comparing the research using GHK-Cu peptide injection vs topical routes shows that the majority of clinical studies have utilized the topical option to research the efficacy of the copper peptide for cosmetic applications

doi: 10.1042/BC20100117

Thiel et al., 2023)

Tissue Regeneration and Wound Repair Laboratory investigations using rodent models have demonstrated that BPC-157 accelerates the repair of diverse tissue injuries, including tendon ruptures, muscle tears, ligament damage, and skin burns

GHK-Cu was first discovered in 1973 by Dr Loren Pickart, who identified its role in promoting youthful characteristics in ageing tissue

Quinn, C