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Injecting unregulated GHK-Cu purchased online introduces risks of heavy metal contamination and copper toxicity that far outweigh the theoretical benefits
What the Human Trial Record Shows This compound has a documented history in human clinical research that distinguishes it from the vast majority of synthetic research peptides, which have never been tested in human subjects
The use of methotrexate may additionally invalidate diagnostic assays for folic acid and vitamin B12
Experts have raised a number of concerns about the the risks of using experimental, unregulated peptides
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