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International shipping is currently not available, making this a U.S.-only product for the time being

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

Swirl gently -- never vortex Allow the peptide to dissolve by gently swirling or rolling the vial between your palms

D.CarrollM

If your calculated dose falls between 15 and 50 units, this size works well