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There is no officially safe maximum limit for humans
First identified in human plasma, GHK-Cu levels naturally decline with age, which has made it a subject of significant research interest
Early research is mostly preclinical, so it should not be treated as a proven anti-aging or fat-loss treatment
Researchers commonly confirm that the reconstituted solution retains its characteristic blue tint, since a loss of color can indicate that an incompatible solvent or extreme pH has disrupted the copper coordination
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