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A 2016 study published in Nature Scientific Reports showed GHK-Cu produced no cytotoxicity to human keratinocytes at concentrations up to 5,800 micromolar over 72 hours and did not induce inflammatory biomarkers unlike other copper compounds

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By 60, levels can be 20-30% lower than they were in your 20s

Mechanism of Action: Why It Makes Sense for Athletes Sermorelin binds to GHRH receptors in the anterior pituitary, increasing pulsatile GH release and downstream insulin-like growth factor-1 (IGF-1) production. Growth hormone and IGF-1 influence several systems relevant to performance: Protein synthesis and muscle repair Collagen formation and tendon remodeling Lipolysis and metabolic efficiency Sleep architecture, particularly slow-wave sleep Because GH secretion is naturally highest during deep sleep, sermorelin is typically administered at night to align with this physiology