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In males, the core fertility factors consist of spermatogenesis, seminal plasma content, and the health of testicular tissue and ducts

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Its binding constant (pKa 16.44) is similar to albumin's copper transport site (log = 16.2), allowing GHK to exchange copper with albumin for intracellular delivery.[3] Discovery and design rationale GHK was first identified in 1973 in fractions of human plasma that promoted survival of liver cells in culture

Research suggests copper peptides can support hair growth, and some studies place GHK-Cu alongside well-known options as a follicle-friendly approach

Bibcode:2011ChEuJ..1710151H