GLOW ships as a lyophilized (freeze-dried) powder. Handling it well in the lab comes down to three things: choosing the solvent, getting the concentration math right, and storing it so the three peptides don’t degrade before you use them.
This guide covers laboratory handling only. It isn’t dosing guidance, and research peptides are not for human or veterinary use.
Storing the unopened vial
- Long term: −20 °C, dry and protected from light.
- Short term (weeks): 2–8 °C in a refrigerator is generally acceptable for lyophilized peptides.
- Before opening: let a cold vial reach room temperature first, so moisture doesn’t condense on the powder.
- GHK-Cu is a copper complex, so keep vials in their box or wrapped in foil to limit light exposure.
Choosing a solvent
Labs typically use sterile water or bacteriostatic water (sterile water with 0.9% benzyl alcohol, which slows microbial growth in multi-use vials). All three GLOW components are water-soluble. Check whether your assay tolerates benzyl alcohol before choosing bacteriostatic water.
Technique
- Wipe the stopper with 70% isopropyl alcohol and let it dry.
- Add the solvent slowly down the inside wall of the vial instead of spraying it onto the powder.
- Swirl or roll gently until the powder dissolves. Don’t shake it, because shaking can cause foaming and aggregation.
- Check the solution. GLOW should be clear and blue from the GHK-Cu. Cloudiness or particles are a reason to stop.
- Label the vial with the date, solvent, volume and concentration.
Concentration math for a 70 mg GLOW vial
Concentration = mass ÷ volume. With a blend, calculate each component separately. For a vial containing 50 mg GHK-Cu, 10 mg BPC-157 and 10 mg TB-500:
| Solvent added | Total blend | GHK-Cu | BPC-157 | TB-500 |
|---|---|---|---|---|
| 2.0 mL | 35.0 mg/mL | 25.0 mg/mL | 5.0 mg/mL | 5.0 mg/mL |
| 3.0 mL | 23.3 mg/mL | 16.7 mg/mL | 3.3 mg/mL | 3.3 mg/mL |
| 5.0 mL | 14.0 mg/mL | 10.0 mg/mL | 2.0 mg/mL | 2.0 mg/mL |
The ratio between the components is fixed in a pre-mixed blend. You can’t change how much of one peptide you have without changing the others. That’s one reason some research designs use the individual peptides instead of the blend.
Storing the reconstituted solution
- Refrigerate at 2–8 °C, protected from light.
- Peptides in solution degrade much faster than dry powder. Published stability data for the GLOW blend doesn’t exist, so shorter use windows are the cautious choice.
- For longer storage, split the solution into single-use aliquots and freeze them at −20 °C. Avoid repeated freeze–thaw cycles.
- Throw out any solution that changes color, turns cloudy or develops particles.
Educational content for laboratory handling only. Not medical advice and not dosing guidance. Research peptides are not approved for human or veterinary use.