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GHK-Cu's ability to upregulate SIRT1 expression provides a direct link between the peptide and established longevity pathways, suggesting that its anti-aging effects operate through well-understood biological mechanisms rather than mysterious or poorly characterized processes

Despite this, many biohackers and longevity researchers have begun self-experimenting with FOXO4-DRI due to its promising results in animal studies

With these core differences established, the next step is determining which option suits your specific health situation