Glow vs. Klow: what's the difference?
Updated October 2026
Two of the most popular named blends sound similar but differ by one peptide. Here's the exact composition of each.
Glow
Glow combines three peptides in one vial: GHK-Cu, BPC-157, and TB-500. It pairs the copper tripeptide (studied in skin-matrix and gene-expression research) with the two classic repair peptides.
Klow
Klow is Glow plus KPV — a four-peptide blend (KPV + GHK-Cu + BPC-157 + TB-500). The added KPV brings the inflammation-signaling fragment into the same preparation.
Why researchers choose blends
Blends let a single reconstituted vial cover several overlapping research pathways at once. Each component peptide is individually assayed for purity before blending, and every lot ships with a COA. For in-vitro research only.
Research-grade in the catalog