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Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex GHK-Cu. Cell Biology International Reports

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That is what makes it different from most topical treatments, which address the surface of a specific area, or from peptides like BPC-157, which address a specific type of tissue damage

Theres a black market production, primarily in China, that sends large amounts of these peptides to the United States with the label For research only, says Pinchas Cohen, MD, dean and distinguished professor of gerontology, medicine, and biological sciences at the USC Leonard Davis School of Gerontology, who has discovered several investigational peptides