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In cell-based and biochemical laboratory research, GHK-Cu has been investigated for its copper-binding behaviour and, in preclinical models, for associations with pathways relating to gene expression, extracellular matrix turnover and oxidative-stress responses
approval in 2005
That's a summary of the research - not a product result or a promise
Importantly, fertility is a long-term consideration spermatogenesis takes ~74 days, so any intervention or insult could take 23 months to manifest in semen changes
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