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The bottom line Copper peptides and GHK-Cu sit at an interesting intersection: enough early science to be genuinely exciting, not yet enough to call them proven
Hormone Molecular Biology and Clinical Investigation, 42 (2), 195198
When Injections Might Still Be Preferred Some peptides are too large or unstable for sublingual absorption
Peptide dosing is a delicate and complicated art
Some users experience temporary increased shedding during this period
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