# KLOW Peptide Composition: What Is in the 80 mg Vial > KLOW Peptide Composition: What Is in the 80 mg Vial — GHK-Cu 50 mg + BPC-157 10 mg + TB-500 10 mg + KPV 10 mg, a 50/10/10/10 co-formulation. The ratio, the chemistry, and why it's blue. Four peptides at a 50/10/10/10 mass ratio — one cyan petal that dwarfs the other three, and the copper that tints it blue. ## The gist of the vial Here is the plain-English start. The KLOW peptide composition is easy to picture as a flower with four petals of different sizes. The most widely listed research vial is 80 mg total, split as GHK-Cu 50 mg, BPC-157 10 mg, TB-500 10 mg and KPV 10 mg. That makes GHK-Cu — the copper peptide — about 62.5% of the vial, the giant petal; the other three are equal and smaller. One more plain fact: this is a co-formulation, which just means four separate peptides dissolved together in one vial. They do not merge into a new single chemical. So the 80 mg is the combined weight of four distinct molecules sharing a vial, not the weight of one compound. The numbers below describe vial content for laboratory handling — never a human dose. ## What is in the 80mg KLOW peptide vial? The most widely listed research-vial composition is 80 mg total: GHK-Cu 50 mg + BPC-157 10 mg + TB-500 10 mg + KPV 10 mg, co-dissolved at fixed mass ratios [4][6]. The four stay separate molecules — a co-formulation, not a single new compound. No FDA-approved or pharmacopeial KLOW combination product exists; the figures are vendor-listed for research handling only. Each component carries its own identity: GHK-Cu (Copper Tripeptide-1, MW 402.92 Da, CAS 89030-95-5), KPV (MW 342.44 Da, CAS 67727-97-3), BPC-157 (MW 1419.53 Da, CAS 137525-51-0), and TB-500 (Ac-LKKTET-Q, MW 889.02 Da). ## What ratio of peptides is in KLOW? The canonical research ratio is 50:10:10:10 by mass — GHK-Cu : BPC-157 : TB-500 : KPV — making GHK-Cu about 62.5% of the 80 mg vial. The other three components are equal at 10 mg each (12.5% apiece). No FDA-approved or pharmacopeial KLOW combination exists, so this ratio is vendor-listed for laboratory handling, not a regulated formulation. It is the share that sizes the cyan petal far larger than the rest in the four-petal diagram. ## Why is GHK-Cu the largest ingredient in KLOW? GHK-Cu is the mass-dominant component — about 50 of 80 mg, roughly 62.5%. Two things justify the share. It has the broadest matrix-remodeling and gene-expression literature of the four: collagen synthesis in human fibroblasts [6], a transcriptome-wide shift across roughly 31.2% of assayed genes [5], and the widest tissue-remodeling profile [4][7]. And it has the longest human track record — decades of topical cosmetic and wound-healing data [4], with quantified transdermal copper delivery [8]. The canonical ratio reflects GHK-Cu's standing as the most-validated of the four peptides. ## Why is KLOW peptide blue? The blue tint comes from copper. The mass-dominant GHK-Cu component (Copper Tripeptide-1) is the tripeptide Gly-His-Lys chelated 1:1 to a copper(II) ion [4], and copper(II) complexes are characteristically blue. So the color is a property of the GHK-Cu chemistry — and of its dominant 50 mg share — not of the blend as a whole. The other three petals (BPC-157, TB-500, KPV) carry no copper and contribute no color; the cyan you see is the copper petal showing through. ## Why KLOW is a co-formulation, not a single molecule The KLOW blend is a co-formulation: multiple distinct compounds dissolved together at fixed ratios, remaining separate molecules rather than forming a single new chemical entity. There is no single PubChem CID, UNII or CAS for KLOW, because a mixture is not a defined substance — per-component identifiers exist instead [4][6]. This matters for honesty: there is nothing to test as "KLOW" the molecule, and there is no single half-life, no single dose-response, and no single safety profile. The four peptides keep their own chemistry inside one vial, which is exactly why the [dosage and the pharmacokinetic mismatch](/dosage) is built in from the start. --- Four peptides, one bloom of cited research — a plain-English field guide to the studies, never a prescription pad.