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Clinical studies have used GHK-Cu at concentrations ranging from 0.01% to 1%, with most effective topical products formulated between 0.05% and 0.5%
Here is an accurate summary: Supported by research: Epitalon's telomere-lengthening mechanism confirmed in human cell lines (2025 independent replication)4 GHK-Cu's gene expression modulation across thousands of genes10 CJC-1295's ability to sustain elevated GH and IGF-1 in phase 2 trials13 BPC-157's tissue repair effects in preclinical models17 Not yet established: Long-term combination effects of any two or more of these compounds (no combination RCTs exist) Human lifespan extension from Epitalon (animal data exists
C.NovellinoE.et al (2024)
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