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doi: 10.3164/jcbn.14-1

Studies have shown that when NAC is taken closer to the sleep phase, it can promote relaxation and improve sleep quality (NIH)

GHK-Cu works at the structural level directly stimulating the synthesis of collagen, elastin, and new blood vessel formation while also reducing inflammation that can contribute to dark circles and puffiness

In professional skincare environments, copper peptide serums are sometimes positioned as post-treatment care products

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