GHK-Cu is a naturally occurring copper-binding peptide involved in tissue repair and remodeling. Research shows it stimulates collagen and elastin synthesis, promotes wound healing, improves angiogenesis, and modulates inflammation. It also exhibits antioxidant activity and supports skin regeneration, with evidence for improved skin thickness and elasticity in topical and injectable studies.

GLOW is a composite peptide formulation built around GHK-Cu–related signaling, and includes the effects of BPC-157 and TB-500. Research and preclinical data suggest enhanced skin regeneration, improved extracellular matrix turnover, and support for cellular repair pathways. It is primarily studied for cosmetic and tissue-quality improvements rather than systemic metabolic effects.

KLOW is a four-component blend containing GHK-Cu, KPV, BPC-157, and TB-500. Research on these peptides shows combined effects on collagen synthesis, tissue repair, angiogenesis, and inflammation reduction. Compared with GLOW, which typically lacks KPV, KLOW adds a specific anti-inflammatory and skin-barrier–stabilizing mechanism, giving it a broader tissue-support and recovery profile.