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Analytical Identity Copper Tripeptide-1 (GHK-Cu, CAS 89030-95-5) is a naturally occurring copper-binding tripeptide - glycyl-L-histidyl-L-lysine chelated to a divalent copper ion (Cu2+) - first identified in human plasma, where its concentration has been reported to decline with age, and later characterized in saliva and other biological fluids
Poor B12 absorption particularly in older adults or those taking proton pump inhibitors is a common risk factor for elevated homocysteine and brain shrinkage (1,2)
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