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Important caveat: This study used a combination product (5-ALA + GHK), not pure GHK-Cu
Researchers attribute these effects to its regulation of nitric oxide pathways and cytoprotective influence on the gut lining
What kinds of experimental models appear in the GHK-Cu literature
Adding compounds like glycine with tirzepatide or glycine and B12 combinations may provide additional support for connective tissue and muscle metabolism
The right choice depends on your phase, your tolerance for daily injections, and how aggressively you want to pursue results
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