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Peptides, including copper peptides like GHK-Cu, are found naturally in the body, but like so many other thingsnamely, collagen and elastinthey decline with age
10.1111/j.1432-1033.1990.tb15595.x 53
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Second, even taken at face value, an assay-specific potency ratio is not a measure of whole-organism effect: it does not mean Dihexa is millions of times more effective in a living brain, where absorption, distribution, and signaling context all differ
The difference is the salt form
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