The KLOW peptide stack is a four peptide research blend combining: GHK Cu for collagen skin and connective tissue pathways, BPC 157 for tissue repair and gut integrity, TB 500 for cell migration and angiogenesis, KPV for Buy KLOW Peptide: GHK Cu, TB 500, BPC, KPV Free Shipping Klow Blend Advanced Regeneration, Recovery & Skin Repair Complex The KLOW Peptide is a combination of 4 peptides, each with a specific function! BPC 157: May help in tissue regeneration and improved muscle recovery TB 500: May help improve vascular connections