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1, reaction 1)
This seemingly minor change -- the addition of a single methyl group -- can influence copper binding geometry, peptide stability, skin penetration, and biological activity
This can be seen with citrulline, arginine or pre-workout boosters, for example
GHK-Cu is studied for collagen synthesis, glycosaminoglycans, extracellular matrix remodeling, fibroblast activity, inflammation, and wound repair mechanisms 4, 5
But its benefits extend far beyond basic protection
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