GHK-Cu vs GLOW Blend (BPC-157 + TB-500 + GHK-Cu)
GHK-Cu (Copper-binding tripeptide) and GLOW Blend (BPC-157 + TB-500 + GHK-Cu) (Multi-component research blend) are documented as co-studied in the PeptiDex library. This page puts the two entries side by side on class, molecular weight, half-life, origin, mechanism and studied research areas — every value taken from the entry it belongs to.
Why these two are co-studied
Cross-referenced for research context — not a usage or combination recommendation.
At a glance
| Attribute | GHK-Cu | GLOW Blend (BPC-157 + TB-500 + GHK-Cu) |
|---|---|---|
| Compound class | Copper-binding tripeptide | Multi-component research blend |
| Research category | Cosmetic & Dermal | Cosmetic & Dermal |
| Length (amino acids) | 3 amino acids | Not documented |
| Molecular weight | 340.4 Da | Not documented |
| Half-life | Not documented | Not documented |
| Origin | GHK is a naturally occurring tripeptide (glycyl-L-histidyl-L-lysine) found in human plasma, with levels reported to decline with age. GHK-Cu is its complex with copper(II) ions and is widely used as a cosmetic ingredient. | GLOW is a marketed research blend combining BPC-157, TB-500, and GHK-Cu. It is not a naturally occurring substance and exists only as a formulated combination whose exact composition may vary by supplier. |
“Not documented” means the PeptiDex entry records no value for that field. Nothing on this page is estimated, and no figure is carried over from one compound to the other.
How GHK-Cu works
GHK has a high affinity for copper(II) and is understood to act partly as a copper-delivery molecule, facilitating copper transport relevant to enzymatic and remodeling processes. In cell and skin research it has been associated with signaling that influences extracellular-matrix remodeling, collagen and glycosaminoglycan synthesis, and antioxidant and gene-expression effects. Much of this work is from in-vitro and skin studies.
How GLOW Blend (BPC-157 + TB-500 + GHK-Cu) works
As a blend, GLOW combines the documented properties of its components: BPC-157's angiogenesis and growth-factor-related repair signaling, TB-500's actin regulation and cell-migration activity, and GHK-Cu's copper-delivery and extracellular-matrix remodeling signaling. These properties derive from separate preclinical and cosmetic research; the combined formulation itself is not validated in controlled human trials.
Mechanistic descriptions reflect published research-literature understanding and are quoted from each compound's own entry. Much peptide research is preclinical (in-vitro or animal-model); mechanism in humans may differ and is not established for many compounds.
Where each one appears in the literature
The research contexts each entry documents. Listing a research area is not a claim of efficacy or a therapeutic indication, and the two lists are not scored against each other.
GHK-Cu
GLOW Blend (BPC-157 + TB-500 + GHK-Cu)
What sets each apart
GHK-Cu
GHK-Cu is the most established copper tripeptide in cosmetic use, distinguished from AHK-Cu by its sequence and from repair peptides like BPC-157 by its remodeling and copper-delivery focus.
GLOW Blend (BPC-157 + TB-500 + GHK-Cu)
GLOW is oriented toward combined skin and tissue-repair research, adding the copper tripeptide GHK-Cu to the BPC-157/TB-500 pairing found in simpler blends.
Documented together as a research blend
Cross-referenced for research context — not a usage or combination recommendation.
Frequently asked questions
What is GHK-Cu?
GHK-Cu is a complex of the naturally occurring tripeptide GHK (glycyl-L-histidyl-L-lysine) with a copper(II) ion. The GHK sequence is a subfragment of the alpha-2 chain of type I collagen and is present in human plasma, where its level declines with age. It is studied primarily as a copper-delivery and skin-remodeling signal peptide.
What is GHK-Cu studied for?
In research and cosmetic-formulation literature it is studied for collagen and glycosaminoglycan synthesis in dermal fibroblasts, wound-model remodeling, and antioxidant/gene-modulating activity. It is characterized as a signaling peptide rather than a therapeutic drug, and is not FDA-approved for treating any condition.
Why is a higher GHK-Cu concentration not necessarily better?
Research summaries note a biphasic dose response: GHK-Cu stimulates matrix synthesis at low (picomolar to nanomolar) concentrations, but at higher concentrations it can also upregulate matrix-degrading enzymes. This is why most cosmetic formulation guidance centers on the low end of the topical range rather than maximizing concentration.
What is the GLOW blend?
The GLOW blend is a research-peptide combination of BPC-157, TB-500, and GHK-Cu. Each component targets a different aspect of tissue and skin remodeling, and the blend is studied together rather than as a single approved drug.
What does each component contribute?
In research framing, BPC-157 is associated with angiogenesis (new blood-vessel growth) at injury sites, TB-500 with actin regulation and migration of repair cells, and GHK-Cu with copper delivery and collagen/elastin matrix remodeling. The rationale is complementary, non-overlapping mechanisms.
What ratio is the GLOW blend usually sold in?
Many GLOW research products are pre-blended in a 5:1:1 ratio of GHK-Cu to TB-500 to BPC-157 (for example 50 mg GHK-Cu, 10 mg TB-500, 10 mg BPC-157 per vial). Ratios vary by supplier, so the certificate of analysis should be checked for the exact amounts.
Answers are the ones published on each compound's own PeptiDex entry. They are educational summaries of research-literature context and are not medical advice.