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MMPs normally regulate collagen degradation, with MMP-1 specifically implicated in the initiation of collagen fragmentation. A 2024 study found that elevated MMP-1 levels contribute to aging skin, causing in mice: A 2016 study showed that GHK-Cu significantly increased gene expression of MMP-1 and MMP-2 at the lowest concentration. Researchers attributed this as one mechanism by which the peptide increased collagen and elastin production

Compared with those of the control group, there were no significant differences in the organ index for any of the organs (Fig

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LL-37 could help clean up LPS while mitigating downstream inflammatory effects