KLOW is a four-compound research peptide blend supplied in a single co-lyophilized vial: 10mg of BPC-157, 10mg of TB-500, 50mg of GHK-Cu, and 10mg of KPV, for 80mg of total peptide content. It is the four-pathway extension of the well-known GLOW stack, and Heartland Bio Labs supplies it for laboratory research use only, with something few suppliers of any blend publish: a certificate of analysis that assays each of the four components individually.
What is the KLOW peptide blend?
KLOW takes the three-compound GLOW recipe of BPC-157, TB-500, and GHK-Cu and adds the tripeptide KPV, the K at the front of the name. Like GLOW, the name describes a recipe rather than a standard, and compositions vary between suppliers. Heartland's KLOW is fixed and labeled: 10mg / 10mg / 50mg / 10mg. A research program working from this vial knows the exact mass of every component, which is the starting requirement for any serious multi-compound study design.
What is in the vial
- BPC-157 (10mg): synthetic 15-amino acid pentadecapeptide, a staple of cytoprotection research (research overview)
- TB-500 (10mg): synthetic thymosin beta-4 fragment analogue studied in actin and cytoskeleton regulation (research overview)
- GHK-Cu (50mg): copper tripeptide complex central to copper-dependent signaling research (research overview)
- KPV (10mg): the C-terminal tripeptide fragment of alpha-MSH, studied in inflammation-signaling research (research overview)
Component-level verification, published
This is the part of the page we would most like you to compare against other suppliers. A single purity percentage on a four-peptide vial is close to meaningless: it cannot tell you whether all four peptides are present, in what amounts, or at what individual purity. A meaningful blend certificate has to identify and quantify each component separately.
KLOW's current published certificate, issued by KMD Analytical, reports each component individually. The most recent published figures: GHK-Cu 99.97% at 49.99mg, BPC-157 99.98% at 10.00mg, TB-500 98.99% at 9.99mg, and KPV 98.88% at 9.97mg, with identity confirmed by mass spectrometry. You can review the certificate data in our COA portal before ordering, and our guide on how to read a peptide certificate of analysis explains every field on it. If another supplier's KLOW does not show you four component assays, you do not actually know what is in the vial.
KLOW vs GLOW
One compound and one question separate them. GLOW is the triple blend (BPC-157, TB-500, GHK-Cu, 70mg total) at $215. KLOW adds 10mg of KPV for 80mg total at $235. The question that decides between them is whether KPV's melanocortin-derived inflammation-signaling pathway belongs in your study design. If yes, KLOW puts all four compounds in one fixed-ratio vial; if not, GLOW is the same platform without it.
KLOW blend vs buying the four peptides separately
Assembling KLOW's masses from single vials at current Heartland pricing costs roughly $301: BPC-157 10mg at $79, TB-500 10mg at $85, GHK-Cu 50mg at $59, and 10mg of KPV as two 5mg vials at $39 each. The blend is $235 in a single vial, about $66 less, with one reconstitution, one fixed ratio, and one certificate covering the finished product. Buy singles when your program needs to vary ratios; buy the blend when it needs the four compounds together, consistently, vial after vial.
Pricing and availability
KLOW ships as the 80mg quad blend (10 / 10 / 50 / 10) at $235, in stock with same-day dispatch from the Tulsa, Oklahoma area for orders placed before 2:00 PM Central. A smaller 70mg configuration appears on the selector with a notify option when it is not in stock. Institutional quantities run through our wholesale program.
Storage and handling
Keep the lyophilized vial sealed, cool, dry, and away from light; refrigerate for longer storage. Reconstitute with bacteriostatic water using gentle swirling, since four peptides share the solution. Refrigerate after reconstitution and use within the timeframe your research protocol defines.
Where to buy the KLOW peptide blend
Search results for KLOW are dominated by clinics marketing treatment programs. For laboratories buying the material itself, the shortlist question is simple: who states the exact composition and shows an independent, component-level certificate before asking for payment? That standard eliminates most of the market. Heartland meets it in public, on this page and in the COA portal, and our guide to vetting a research peptide supplier shows you how to hold every vendor to it.
Reconstitution math
Work out concentration (mg/mL), amount per volume and molarity for any vial size with the BPC-157 reconstitution calculator, TB-500 reconstitution calculator, GHK-Cu reconstitution calculator, general peptide calculator. For the bench procedure see how to reconstitute peptides.
Research use only
KLOW from Heartland Bio Labs is sold strictly for laboratory research and identification purposes. It is not a drug, it has not been evaluated by the FDA, and it is not for human or veterinary use of any kind. By purchasing, you affirm that you are qualified to handle research compounds and agree to our research use policy.
