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In preclinical models it accelerates mucosal tissue repair, supports intestinal lining integrity, reduces markers of intestinal permeability, and promotes angiogenesis in gastrointestinal tissue

Montgomery, E

A Pickart and Margolina review (2018) summarized data showing GHK-Cu increases collagen production in fibroblast cultures and accelerates wound closure in animal models

When applied to venous pathology, the hypothesis is that sustained collagen synthesis could restore structural integrity to weakened vein walls

Selling those products for people to inject is selling an unapproved drug, and using them is neither legal nor safe