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However, the lethal dose of GHK-Cu peptide is very high around 21,000 mg for a 70kg human (or about 330 mg/kg) [13]

doi:10.1038/s42255-023-00917-5
Retinols ability to promote cell turnover, reduce fine lines and wrinkles, and improve skin texture, combined with the collagen-boosting properties of GHK-Cu, creates a powerhouse duo for anti-aging and overall skin health
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