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J Clin Invest 133:e165654
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While both peptides can enhance natural growth hormone (GH) activity, their mechanisms and effects are distinct
Begin with the impurity profile, which is set by the production route
A household refrigerator can fluctuate more than a lab refrigerator, especially near the door
This is also why GHK-Cu appears frequently in longevity-adjacent research alongside other compounds studied for age-related cellular changes, since a quantifiable, age-correlated decline gives researchers a concrete variable to test against rather than a purely theoretical one
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