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Strongest human evidence (topical) The Leyden 2002 photoaging trial in 71 women applied a GHK-Cu facial cream for 12 weeks and reported measurable improvements in skin density, thickness, fine lines, and laxity
Injury Prevention in Progressive Overload Training Bodybuilders routinely push tissues beyond normal physiological stress through progressive overload
Gu, X.F
A gene profiling study found that GHK modulated expression of 4,048 human genes at a very low concentration of 1 micromolar, with significant upregulation of genes involved in tissue remodeling and anti-inflammatory responses 15
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