It might take quite a long time for clinical trials to start because using broad-spectrum MMP inhibitors has been restricted
Plasma GHK drops from ~200 ng/mL in your twenties to ~80 ng/mL by sixty, and restoring it topically or subcutaneously signals fibroblasts to rebuild collagen, elastin, and glycosaminoglycans, enlarges hair follicles, drives angiogenesis, and shifts gene expression toward a younger profile
GHK-Cu works through a different mechanism, supporting the follicle environment rather than blocking DHT
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Sci Rep 14 , 15153 (2024)