KLOW Stack is a fixed multi-peptide blend supplied as a single lyophilized vial that combines four research peptides at a set ratio: GHK-Cu 25mg + TB-500 10mg + BPC-157 10mg + KPV 10mg per vial (55 mg total mass). KLOW is a vendor-coined blend name rather than a standardized formulation, and it is offered strictly for research use only. The same concept minus KPV is marketed as GLOW, so KLOW can be read as GLOW plus the alpha-MSH-derived anti-inflammatory tripeptide KPV.
Scientific Background
The blend thesis behind KLOW is that its four peptides address complementary, largely non-overlapping nodes of tissue-repair biology, so a single vial covers angiogenesis, matrix remodeling and inflammation together in preclinical models. The component science is dose-independent, but the per-mL concentration after reconstitution depends on the exact vial loading.
- GHK-Cu delivers the matrix and antioxidant axis: at 1 to 10 nM it modulates collagen and glycosaminoglycan turnover and the MMP-TIMP system, induces bFGF and VEGF, and scavenges ROS (about 50% reduction of t-BHP-induced ROS in Caco-2 at 10 microM).
- TB-500, the N-acetylated active fragment Ac-LKKTETQ of thymosin beta-4, targets monomeric G-actin to buffer cytoskeletal dynamics, cell migration and angiogenesis.
- BPC-157 acts pro-angiogenically via VEGFR2-Akt-eNOS signaling, increasing vessel density and blood-flow recovery in ischemic rat hindlimb models (Hsieh 2017).
- KPV is taken up via the PepT1 transporter and inhibits NF-kB and MAPK signaling, lowering pro-inflammatory cytokines in murine colitis models (Dalmasso 2008).
Composition / Biochemical Properties
KLOW combines four structurally and mechanistically distinct peptides in a 25 : 10 : 10 : 10 ratio. Because it is a fixed blend, the four components cannot be dosed separately, and pharmacokinetics are component-specific rather than blend-wide.
- Composition: GHK-Cu (Gly-His-Lys with copper(II)) 25 mg, TB-500 fragment (Ac-LKKTETQ) 10 mg, BPC-157 (15-aa Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val) 10 mg, KPV (Lys-Pro-Val) 10 mg.
- Total mass: 55 mg per vial; GHK-Cu is the mass-dominant and least-stable component (rate-limiting for blend stability, optimal pH about 5.0 to 6.5).
- Half-life: only thymosin beta-4, the parent of TB-500, has hard human values (terminal t1/2 about 0.5 to 2.08 h; Wang 2021); GHK-Cu, BPC-157 and KPV have no validated human PK.
Buy KLOW Stack at Eurolabs Peptides
KLOW Stack is available in three pack sizes so research workflows can scale supply to the experiment without repeat ordering.
- 1 Pack (single vial)
- 2 Pack (two vials)
- 3 Pack (three vials)
Each batch is supported by HPLC purity verification and a Certificate of Analysis (CoA), with quality-control documentation available so researchers can confirm identity and purity before use.
Worldwide Shipping - Safe and Hassle-Free
Bergdorf Bioscience ships KLOW Stack worldwide with discreet, tracked packaging. Lyophilized vials are stable for shipping; store frozen at -20 C for long-term holding, and after reconstitution with bacteriostatic water refrigerate at 2 to 8 C and use within about 28 to 30 days. For research use only, not for human consumption.
