ghk-cu stimulates elastin production GHK-Cu: The Peptide That Transforms Skin and Tissue Health – Calibrate IV How GHK-Cu Tightens Loose Skin:

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Timeline of benefits from epitalon Sleep benefits are likely to be the first effects that users feel, arising within the first 1-2 weeks of use

doi: 10.1163/156856208784909435), controlled studies on aged skin with GHK-Cu (Gly-(L-His)-(L-Lys)) demonstrated that it has the potential to tighten skin, improve elasticity and firmness, reduces fine lines, wrinkles, photodamage and hyperpigmentation, which is why we chose to include it as an active in this serum

This dual action creates an optimal environment for the formation of new collagen and elastin

Both are copper tripeptides, but AHK-Cu uses alanine as its first amino acid while GHK-Cu uses glycine