(6) Increased bone marrow adipose tissue accumulation and altered mesenchymal stem cell differentiation contribute to reduced osteoblast activity, increased osteoclastic resorption, and an overall decline in bone strength, leading to a greater fracture risk despite higher bone mineral density measurements
The pattern struck Holland-Lulewicz and his co-authors as both surprising and telling
The study further demonstrated that BPC 157 time-dependently activated the downstream VEGFR2-Akt-eNOS signaling pathway

Documented mechanisms include: Gene expression modulation published research has measured GHK-Cu influence on the expression of over 4,000 genes related to repair, regeneration, antioxidant systems, and cellular aging Copper-dependent enzyme cofactor activity copper is required for several antioxidant enzymes (most notably superoxide dismutase), and GHK-Cu participates in copper delivery to these systems Collagen synthesis upregulation fibroblast cultures exposed to GHK-Cu produce measurably more Type I collagen than control conditions Glycosaminoglycan synthesis hyaluronic acid and related GAGs increase in research models Fibroblast proliferation and migration measured in cell culture studies Anti-inflammatory effects pro-inflammatory cytokine modulation in research models DNA repair pathway engagement research has documented effects on genes involved in cellular DNA repair The multi-pathway, multi-target nature of GHK-Cus mechanism is what makes the compound interesting in research contexts it doesnt fit the one receptor, one effect model of most synthetic peptides

Pruijm M, Hofmann L, Charollais-Thoenig J et al (2013) Effect of dark chocolate on renal tissue oxygenation as measured by BOLD-MRI in healthy volunteers