GLOW vs GHK-Cu: Single Compound or Three-Peptide Blend
GHK-Cu is sold on its own and is also one of three components in GLOW. This guide compares the single compound with the blend: what GLOW adds, how the choice affects research design, and how the costs compare.
Research use only. Not for human consumption. Not evaluated by Health Canada. This guide covers specifications, storage and documentation. It gives no dosing or usage guidance.
In short.
- GHK-Cu is one copper-binding tripeptide in one vial, 50mg ($54.99) or 100mg ($84.99). GLOW is a 70mg blend of GHK-Cu, BPC-157 and TB-500 in one vial ($174.99).
- A single compound lets you study one variable. A blend studies a fixed combination, and any result belongs to the combination.
- GHK-Cu alone costs $0.85 to $1.10 per mg. GLOW's $2.50 per mg is an all-components figure across its 70mg total, so compare the two on what each vial contains and what it costs.
Side by side.
| Spec | GHK-Cu 50mg | GHK-Cu 100mg | GLOW |
|---|---|---|---|
| Components | GHK-Cu | GHK-Cu | GHK-Cu, BPC-157, TB-500 |
| Total fill | 50mg | 100mg | 70mg blend |
| GHK-Cu content | 50mg | 100mg | Listed on the COA for your lot |
| Form | Lyophilized powder | Lyophilized powder | Lyophilized powder |
| One-time price | $54.99 | $84.99 | $174.99 |
| Cost per mg (all components) | $1.10 | $0.85 | $2.50 |
| SKU | VRX-CU50-OTP | VRX-CU100-OTP | VRX-GLOW-OTP |
Prices in CAD as listed on 26 Sept 2026. Subscription pricing is 15% lower across all three. GLOW's cost per mg is the price divided by total fill, across all three components together.
What GHK-Cu is.
GHK-Cu is the tripeptide glycyl-L-histidyl-L-lysine bound to a copper(II) ion. GHK occurs naturally in human plasma, saliva and urine. A 2015 review of GHK biology notes that it was first isolated in 1973 as an activity in human albumin, and later work identified it as a tripeptide with a strong affinity for copper that readily forms the GHK-Cu complex. The copper complex has the formula C14H23CuN6O4 and a molecular weight of 402.92 g/mol.
It is a small molecule compared with the other two peptides in GLOW, and it has the lowest cost per mg of any single compound in the Vitaliti catalogue.
What GLOW adds.
GLOW puts GHK-Cu in one vial with two larger peptides.
| Compound | What it is | In GHK-Cu vial | In GLOW |
|---|---|---|---|
| GHK-Cu | Copper-binding tripeptide | Yes | Yes |
| BPC-157 | Synthetic 15-amino-acid peptide, sequence GEPPPGKPADDAGLV, based on a gastric peptide | No | Yes |
| TB-500 | Synthetic peptide based on thymosin β4, a 43-amino-acid actin-sequestering protein | No | Yes |
BPC-157 has a molecular weight of 1419.5 g/mol. Thymosin β4, the protein TB-500 is based on, is about 5 kDa, and its actin-binding region has been studied in short synthetic sequences, including in a 2003 study of thymosin β4's actin-binding site and a 2010 study of its active short peptide sequences. Both are sold separately by Vitaliti as single vials.
GLOW is sold as a 70mg total of the three components. For how each component was reported in your vial, read the component list on the label and the COA for that lot.
Single compound or blend: research design.
Neither option is better in general. They answer different kinds of questions.
A single compound isolates one variable. With GHK-Cu alone, anything observed in the work can be attributed to GHK-Cu, within the limits of the design. The amount used is set by the researcher. Adding other compounds later, from separate vials, keeps each one as its own variable.
A blend studies a combination. With GLOW, the three compounds are present together, at a ratio fixed at manufacture. Any observation belongs to the combination. Without separate single-compound arms, the blend alone cannot show which component, or which interaction, accounts for a result.
| Question | Single GHK-Cu vial | GLOW blend |
|---|---|---|
| Can one compound be studied alone? | Yes | No |
| Who sets the ratio between compounds? | Researcher, using separate vials | Fixed at manufacture |
| Number of lots and COAs to track | One per vial | One per vial, covering three components |
| Reconstituted storage window | Applies to one compound | Applies to all three at once |
Vitaliti's stated window for a reconstituted vial is up to 30 days refrigerated, whichever product is opened.
Price per vial.
Straight cost per mg favours the single vial by a wide margin: $0.85 to $1.10 for GHK-Cu against $2.50 for GLOW. That comparison is misleading on its own. GLOW's $2.50 is an all-components figure, the price divided by the 70mg total of GHK-Cu, BPC-157 and TB-500 together. It is not a cost for the GHK-Cu inside the blend.
The clearer comparison is what each vial contains and what it costs.
| Vial | Contains | Price per vial | Cost per mg |
|---|---|---|---|
| GHK-Cu 50mg | 50mg GHK-Cu | $54.99 | $1.10 |
| GHK-Cu 100mg | 100mg GHK-Cu | $84.99 | $0.85 |
| GLOW | 70mg total of GHK-Cu, BPC-157 and TB-500 | $174.99 | $2.50 (all components) |
BPC-157 and TB-500 are also sold as single vials, in 5mg and 10mg sizes.
If your work only needs GHK-Cu, the single vial is the direct option and the 100mg size has the lower cost per mg. If your work is about the combination of all three compounds, GLOW supplies them together in one vial.
Documentation for either choice.
Every Vitaliti batch is tested by an independent third-party lab. Independent labs report blends in different ways. Some give identity and measured amount for each component; some add a purity figure per component; some give a single blend-average purity and total content alongside measured vs labelled amounts per component. Some labs measure identity and amount only for blends, because the peaks of several peptides can overlap and obscure each other's impurities. The COA for your lot shows how its lab reported each component.
Each vial is labelled with its lot code and expiration date. The COA for your lot is available on request at contact@vitalitipeptide.com.