This decline has led some researchers to speculate that reduced GHK signaling could contribute to age-related impairments in: wound healing tissue repair collagen production While this hypothesis remains under investigation, it helps explain why GHK-Cu supplementationparticularly through topical formulationshas become a focus of dermatologic research
And FDA regulators agreed, saying later that the substances present significant safety risks, because most have not been extensively tested in humans
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But the peptides being promoted by influencers, celebrities and wellness gurus are different: Many have never been approved for human use and much of their purported evidence comes from studies in rats and other animals
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