If using both: Many patients apply the tretinoin/niacinamide product at night and GHK-Cu in the morning, or alternate evenings
The biological roles proposed for GHK-Cu in the research literature have included effects on collagen and extracellular matrix synthesis (through copper-dependent enzymes including lysyl oxidase), on antioxidant gene networks (where copper participates in both prooxidant and antioxidant chemistry depending on context), on growth factor activity in tissue repair, on hair follicle biology, and on broader transcriptional programs characterized in microarray and RNA-seq studies
KPV appears to exert its effects via the peptide transporter PepT1 rather than classical melanocortin receptors
Reviewing the team's patent and related documents at Talpos's request, Anna Mapp, the Edwin Vedejs Collegiate Professor of Chemistry at the University of Michigan, and also the President of the American Peptide Society, questioned the limited detail available and the absence of a published sequence for the peptide's parent protein, an omission she noted makes the original work impossible to reproduce
Enhanced Nutrient Absorption : By repairing the intestinal lining, BPC-157 may improve absorption of vitamins, minerals, and macronutrients