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Many clients see results in their skin within a few days

That could be a lot of things, but the timing lined up with adding GHK-Cu

All combination data comes from anecdotal clinical observations or theoretical synergy based on separate mechanisms

This is not a failure of formulation quality or dosage

GHK Peptide as a Natural Modulator of Multiple Cellular Pathways (2015) review (PMC | PubMed) Borkow

"It also restored mobility to osteoarthritic mice and significantly reduced their pain." As a proof of principle that this might also work in humans, the researchers transferred human tissue into mice that were bred to not reject the tissue, and were able to show that human skeletal stem cells could be steered toward bone development but stopped at the cartilage stage