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ACL reconstruction (rat model): Intra-articular GHK-Cu injections at 0.3-3 mg/mL transiently improved knee laxity outcomes at 6 weeks post-surgery, though improvements were not sustained at 12 weeks (PMID 25731775)
The FDA classifies it as a prescription drug, though some websites sell it illegally, transacting even without a prescription
Impaired spermatogenesis was not obvious, and mature spermatogenic cells were absent in groups C and D
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