The first is sequence stabilization against fibrillation
For reproducible research outcomes, GHK-Cu is preferred because the copper:peptide stoichiometry is fixed at synthesis, whereas copper-free GHK may produce variable results depending on the copper content of the culture medium or biological matrix used
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Pedersen BK, Ostrowski K, Rohde T, Bruunsgaard H: The cytokine response to strenuous exercise
*Correspondence: Liping Qu, [email protected] Disclaimer All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers
While this drives fat loss, the body also catabolizes muscle for energy when deficits become too large