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It has attracted significant, sustained attention in in-vitro research focused intensely on connective tissue, skeletal muscle fibers, tendons, ligaments, and highly specialized gastrointestinal tissue models

De Groot, A

GHK-Cu, first identified in 1973 from mammalian plasma, functions as a naturally occurring copper-peptide complex that influences approximately 31% of the human genome, resetting gene expression patterns to favor tissue repair while delivering bioavailable copper essential for enzymatic processes underlying collagen synthesis and antioxidant defense

Iron deficiency, especially in women, has long been linked with excessive hair shedding

doi:10.1016/0196-0709(93)90046-a