Cagrilintide is a long-acting amylin analogue that reduces appetite through the amylin and calcitonin receptors
They added GHK-Cu in concentrations of 10 M to 10 M and measured: Collagen synthesis (by radioactive proline incorporation) Non-collagen protein synthesis Cell proliferation What they found: Stimulation of collagen synthesis by 70 % at the optimal concentration of 10 M (1 nM) The effect was NOT dependent on increased proliferation, fibroblasts increased production per cell Background: GHK without copper had a dramatically weaker effect , Cu is critical Reversibility: After removing GHK-Cu, synthesis returned to baseline Why it matters: This is the fundamental mechanistic study that documented the effect of GHK-Cu on collagen
This gap between extensive animal research and limited human clinical data characterizes the current state of BPC-157 science
It also plays a role in detoxification, helping to protect skin cells from free radical damage and environmental stress
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They engage overlapping but not identical pathways, serve somewhat different experimental purposes, and have very different research depth in the published literature